taxonID	type	description	language	source
039F87A1CE54FFA2FF598E72FCE6FD56.taxon	description	AS; Akademgorodok, 23. VI 2017, 2 ♀♀, KB; idem, 3. VII 2017, 2 ♀, 1 ♂, KB; Altai Terr.: Yuzhnyi, 5. VII 2006, 1 ♂, YD [ISEA]; idem, 8. VIII 2010, 1 ♂, YD, AB; Kolyvanskoe Lake, 18. VII 2017, 1 ♀, MP [FSCV]; idem, 28. VII 2017, 1 ♀, MP [FSCV]; Volchikha, 26. VII 2017, 1 ♀, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA2FF598E72FCE6FD56.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Km, No, Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA2FF598DCAFD7CFC63.taxon	description	Novosibirsk Prov.). SPECIMENS EXAMINED. Russia. Novosibirsk Prov.: Razyezd Inya, 3. VII 2010, 1 ♀, 1 ♂, YD, AB; Altai Terr.: Yuzhnyi, 8 - 9. VIII 2010, 1 ♂, YD, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA2FF598DCAFD7CFC63.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Km, No, Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA2FF598CBDFC19FB78.taxon	description	AB; Novosibirsk Prov.: Razyezd Inya, 3. VII 2010, 1 ♀, YD, AB; Altai Terr.: Kolyvanskoe Lake, 24. VII 2011, 1 ♀, YD, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA2FF598CBDFC19FB78.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Km, No, * Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA2FF598BA0FD69FA3B.taxon	description	AB; Tatarka, 17. VI 2012, 1 ♀, AP; Novosibirsk Prov.: Veselovskoe, 28. VI 2015, 2 ♂, AB; Krasnozerskoe, 1. VII 2015, 1 ♂, AB; Altai Terr.: Yuzhnyi, 18. VI 2011, 1 ♂, YD [ISEA].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA2FF598BA0FD69FA3B.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Om, Km, * No, Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA2FF598BA0FD69FA3B.taxon	discussion	REMARK. The coloration of the specimens examined differs from that of the nominate taxon and agrees with the description of Anthidium senile Eversmann, 1852. The latter is regarded as a junior synonym of A. punctatum since Mocsáry (1884), but was also treated as a Siberian subspecies by some authors (Popov, 1948).	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA3FF598AE5FC01FD90.taxon	description	(Altai Terr.); Proshchalykin, 2013 a: 149, 152 (Altai Terr., Novosibirsk Prov.). Dubatolov [ISEA, MP det.]; Razyezd Inya, 3. VII 2010, 1 ♀, YD, AB; Akademgorodok, 21. VIII 2010, 1 ♀, AB; Zavyalovo, 19. VII 2011, 3 ♂, AS; Karasuk, 1. VIII 2011, 2 ♀, 1 ♂, NB; Veselovskoe, 27. VI 2015,1 ♀, AB; Altai Terr.: Pushkino, 31. VII 1952, 1 ♀ [ISEA, MP det.]; idem, 27. VII 1953, 1 ♀ [ISEA, MP det.]; Golubtsovo, 18. VII 1953, 1 ♀ [ISEA]; Zelenaya Dubrava, 20. VII 1953, 1 ♀ [ISEA, MP det.]; Zimari, 30. VII 2005, 1 ♀, YD [ISEA, MP det.]; idem, 2. VII 2006, 1 ♂, YD [ISEA, MP det.]; Yuzhnyi, 4 - 13. VII 2006, 1 ♀, 1 ♂, YD [ISEA, MP det.]; idem, 3. VIII 2010, 1 ♀, 1 ♂, MP [FSCV, MP det.]; idem, 8. VIII 2010, 1 ♂, YD; idem, 8 - 9. VIII 2010, 1 ♀, 3 ♂, YD, AB; Severka, 30. VII 2011, 1 ♂, AB, 1 ♂, DN, 2 ♂, YD; Solonovka, 19. VII 2015, 1 ♀, AB; Volchikha, 20. VII 2015, 3 ♀, AB; 26. VII 2017, 1 ♀, MP [FSCV]; Kolyvanskoe Lake, 18. VII 2017, 4 ♀, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE54FFA3FF598AE5FC01FD90.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Om, Km, No, Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE55FFA3FF598D88FD55FCDA.taxon	description	MP det.].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE55FFA3FF598D88FD55FCDA.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Km, Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE55FFA3FF598C46FCB8FB12.taxon	description	SPECIMENS EXAMINED. Russia. Omsk Prov.: Bolshoi Atmas, 30. VII 2015, 7 ♀, 4 ♂, AB; idem, 31. VII 2015, 10 ♀, 19 ♂, AB; Novosibirsk Prov.: Karasuk, 17. VII 2007, 1 ♂, YD [ISEA, MP det.]; Evsino, 29. VI 2012, 1 ♂, AB; idem, 22. VI 2017, 1 ♀, KB; Altai Terr.: Bykovo, 1. VII 1928, 1 ♀, Tankov [ISEA, MP det.]; Zelenaya Dubrava, 9. VII 1952, 1 ♂ [ISEA MP det.]; Yuzhnyi, 29. VII 2001, 1 ♂, YD [ISEA, MP det.], idem, 3. VII 2010, 2 ♀, 4 ♂, MP [FSCV, MP det.]; Belmesevo, 24. VII 2007, 2 ♂, YD [ISEA, MP det.]; Klepechiha, 23. VII 2011, 1 ♂, AB; Solonovka, 29. VII 2011, 1 ♂, AB; idem, 19 - 20. VII 2015, 1 ♀, AB; Mihailovskoe, 30. VII 2011, 1 ♂, AB; Kuchukskoe Lake, 20 - 21. VII 2017, 3 ♀, 4 ♂, MP [FSCV]; Kulundinskoe Lake I, 23 - 24. VII 2017, 7 ♀, 7 ♂, MP [FSCV]; Volchikha, 26. VII 2017, 1 ♀, 1 ♂, MP [FSCV]; Kolyvanskoe Lake, 27. VII 2017, 1 ♂, MP [FSCV]. Kazakhstan. Pavlodar Prov.: Maraldy Lake, 26 - 28. VII 2015, 8 ♀, 12 ♂, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE55FFA3FF598C46FCB8FB12.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Om, No, Al, * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE55FFA3FF598A08FECEF99A.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * No. This is a first record from the territory to the eastward of the Urals.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE55FFA3FF598A08FECEF99A.taxon	discussion	REMARK. Pseudoanthidium tenellum is a member of the “ lituratum ” species complex. The reliable characters for delimitation of this species from others were given in Aguib et al. (2010), but we have been unable to use them for females, because of their complexity and the lack of material for comparison. Our female specimens could be P. tenellum, P. nanum (Mocsáry, 1881) or one of three species described from the Urals which have not been revised properly: P. floripetum (Eversmann, 1852), P. reptans (Eversmann, 1852), and P. eversmanni (Radoszkowski, 1886) (see Proshchalykin et al., 2017). Thus females are not listed here.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598DE4FCCBFC8F.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Om, Km, Kh. Tribe Lithurgini Newman, 1834	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598A2CFCCDFA23.taxon	description	(MS det.); Altai Terr.: Kuchukskoe Lake, 26. VI 2016, 1 ♀, AB; idem, 20 - 21. VII 2017, 1 ♀, MP [FSCV]; Volchikha, 26. VII 2017, 1 ♀, MP [FSCV]. Kazakhstan. Pavlodar Prov.: Maraldy Lake, 26 - 27. VII 2015, 1 ♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598A2CFCCDFA23.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Om, Km, * Al, * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598C92FCCDFAFC.taxon	description	SPECIMENS EXAMINED. Russia. Novosibirsk Prov.: Evsino, 29. VI 2012, 1 ♀, 1 ♂, AB; Altai Terr.: Golubtsovo, 3. VII 1953, 1 ♂ [ISEA]; Borzovaya Zaimka, 5. VII 2006, 1 ♀, YD [ISEA]; Yuzhnyi, 13. VII 2006, 1 ♀, 1 ♂, YD [ISEA]; idem, 8. VIII 2010, 1 ♀, YD; 8 - 9. VIII 2010, 3 ♀, YD, AB; Solonovka, 29. VII 2011, 1 ♀, AB, 1 ♂, YD; Severka, 30. VII 2011, 1 ♀, AB, 1 ♀, 2 ♂, YD, 2 ♀, DN.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598C92FCCDFAFC.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Om, Tk, Km, No, Al. Tribe Megachilini Latreille, 1802	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598E03FD7CFE4C.taxon	description	♀, MP [FSCV, MP det.]; Altai Terr.: Yuzhnyi, 4. VII 2006, 1 ♂, YD [ISEA, MP det.]; idem, 3. VIII 2010, 1 ♂, MP [FSCV, MP det.].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598E03FD7CFE4C.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Km, No, Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598EDCFD9DFD44.taxon	description	YD, AB; Akademgorodok, 8. VII 2011, 1 ♀, AS; Altai Terr.: Yuzhnyi, 8 - 9. VIII 2010, 4 ♂, YD, AB; Solonovka, 21. VII 2015, 1 ♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA0FF598EDCFD9DFD44.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Tk, Km, No, * Al, Kh. Tribe Dioxyini Cockerell, 1902	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA1FF598AFEFC17FE39.taxon	description	Atmas, 31. VII 2015, 1 ♀, 1 ♂, AB; Altai Terr.: Kirova, 4. VII 2006, 2 ♀, YD [ISEA]; Yuzhnyi, 5. VII 2006, 1 ♀, YD [ISEA]; idem, 13. VII 2006, 1 ♂, YD [ISEA]; idem, 3. VIII 2010, 1 ♂, MP [FSCV, MP det.]; Severka, 30. VII 2011, 1 ♀, AB; Volchikha, 20. VII 2015, 1 ♀, AB; Kuchukskoe Lake, 22. VII 2017, 1 ♀, MP [FSCV]; Novosibirsk Prov.: Karasuk, 1. VIII 2011, 1 ♀, 1 ♂, DN. Kazakhstan. Pavlodar Prov.: Maraldy Lake, 26 - 28. VII 2015, 3 ♀, 2 ♂, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE56FFA1FF598AFEFC17FE39.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Om, Km, * No, Al, * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598EE0FE34FD83.taxon	description	MS det.].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598EE0FE34FD83.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Al. This is a first record from the territory to the eastward of the Urals.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598D9DFCC9FCEA.taxon	description	Novosibirsk Prov.: Tandovo Lake, 20. VIII 1997, 1 ♀, BR [ISEA].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598D9DFCC9FCEA.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Om, Tk, Km, * No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598C37FC88FC04.taxon	description	Zolotarenko [ISEA, MS det.]; idem, 30. VI 2015, 1 ♂, KB; idem, 3. VII 2015, 1 ♂, AB; Suzun, 14 - 15. VII 2015, 1 ♀, AB; Altai Terr.: Kirova, 4. VII 2006, 1 ♀, YD [ISEA]; Klepechiha, 23. VII 2011, 1 ♂, AB [MS det.].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598C37FC88FC04.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Km, No, * Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598B24FC46FB17.taxon	description	[ISEA]; Karasuk, 3. VI 1982, 2 ♂, BR [ISEA]; Akademgorodok, 3. VII 2017, 1 ♂, KB; Altai Terr.: Yuzhnyi, 13. VII 2006, 1 ♂, YD [ISEA]; Kolyvanskoe Lake, 28. VII 2017, 1 ♀, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598B24FC46FB17.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Tm, Ku, Om, Tk, Km, * No, * Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598A09FCDDFA46.taxon	description	[ISEA]; Inder, 12. VIII 1992, 1 ♀, BR [ISEA]; Altai Terr.: Kuchukskoe Lake, 20 - 21. VII 2017, 1 ♀, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFA1FF598A09FCDDFA46.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Km, * No, Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFAEFF598ADAFC4EFE96.taxon	description	[ISEA]; idem, 16. VII 1987, 1 ♀, BZ [ISEA]; Boyarka, 8. VII 1987, 1 ♀, BZ [ISEA]; idem, 9. VII 1987, 1 ♀, BZ [ISEA]; idem, 14. VII 1987, 1 ♀, BZ [ISEA]; idem, 15. VII 1987, 1 ♀, BZ [ISEA]; Altai Terr.: Yuzhnyi, 18. VI 2011, 1 ♂, YD.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE57FFAEFF598ADAFC4EFE96.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Tk, Km, * No, * Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAEFF598E8AFD58FDFF.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Km, No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAEFF598D21FCB7FD29.taxon	description	Veselovskoe, 28. VI 2015, 3 ♀, AB; Altai Terr.: Malahovo, 20. VII 1984, 1 ♂, N. Gulyashova [ISEA]; Centralnyi, 5. VII 2006, 1 ♂, YD [ISEA]; Yuzhnyi, 9. VIII 2010, 1 ♀, YD, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAEFF598D21FCB7FD29.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Km, No, * Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAEFF598DF6FC10FC2E.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku,? Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAEFF598DF6FC10FC2E.taxon	discussion	REMARK. The species is known from the environs of Kamen-na-Obi (Altai Terr.) based on one specimen listed without its sex (Wnukowskij, 1927). It is not possible to locate this specimen. The species is widely distributed, so there is no reason to exclude it from the fauna of West Siberia, but verification of its presence in Altai Terr. is needed.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAEFF598CF1FC04FA6E.taxon	description	(Novosibirsk Prov.); Proshchalykin, 2013 b: 142 (Novosibirsk Prov.). Megachile centuncularis: Shumakova et al., 1982: 166, part (Altai Terr.), misidentification. SPECIMENS EXAMINED. Russia. Omsk Prov.: Bolshoi Atmas, 29. VI 2011, 1 ♀, AS; idem, 31. VII 2015, 1 ♀, AB; Tatarka, 13. VI 2012, 1 ♂, KB, 2 ♂, AP; idem, 17. VI 2012, 1 ♂, AB, 1 ♂, AP; Novosibirsk Prov.: Akademgorodok, 21. VIII 2010, 1 ♀, AB; idem, 23. VI 2017, 1 ♀, KB; idem, 3. VII 2017, 1 ♂, KB; Zavyalovo, 19. VII 2011, 2 ♀, AS; idem, 22. VII 2011, 1 ♂, AS; Veselovskoe, 27. VI 2015, 1 ♀, AB; Krasnozerskoe, 1. VII 2015, 1 ♀, AB; Altai Terr.: Golubtsovo, 18. VII 1953, 1 ♀, [ISEA]; Yuzhnyi, 4. VII 2006, 1 ♀, YD [ISEA]; idem, 8 - 9. VIII 2010, 1 ♀, YD, AB; Kuchukskoe Lake, 26. VI 2016, 3 ♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAEFF598CF1FC04FA6E.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Om, Tk, Km, No, * Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAEFF598CF1FC04FA6E.taxon	discussion	REMARK. There are two specimens of Megachile centuncularis listed without their sex in Shumakova et al. (1982). Only one of them (a female) collected near Golubtsovo (Altai Terr.) was found in the ISEA collection and belongs to M. bombycina.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAFFF598AB1FCD3FDB2.taxon	description	SPECIMENS EXAMINED. Russia. Omsk Prov.: Bolshoi Atmas, 24. VI 2011, 4 ♀, AB, 1 ♀, KB, 6 ♀, NH, 1 ♀, AP, 1 ♀, AS; idem, 26. VI 2011, 6 ♀, KB, 1 ♀, AP; idem, 27. VI 2011, 1 ♀, AP, 1 ♀, KB; idem, 28. VI 2011, 2 ♀, AB, 1 ♀, AS, 1 ♀, DN, NB; idem, 14. VI 2012, 1 ♀, AP; idem, 15. VI 2012, 1 ♀, 1 ♂, AB, 1 ♂, AP; idem, 16. VI 2012, 1 ♀, KB, 1 ♂, AP; idem, 31. VII 2015, 2 ♀, AB; Krasnyi Oktyabr, 25. VI 2011, 1 ♀, AP; Tatarka, 13. VI 2012, 1 ♀, AB; idem, 17. VI 2012, 1 ♂, KB; Novosibirsk Prov.: Chany Lake, 18. VI 1988, 1 ♂, Yu. Kharitonov [ISEA]; Karasuk, 1. VIII 2011, 1 ♀, DN; Krasnozerskoe, 13 - 14. VI 2016, 1 ♂, KB; idem, 15 - 16. VI 2016, 1 ♂, KB; Akademgorodok, 3. VII 2017, 1 ♂, KB; Evsino, 6. VII 2017, 1 ♂, KB; Altai Terr.: Kuchukskoe Lake, 26. VI 2016, 1 ♀, AB; idem, 28. VI 2016, 3 ♀, AB; Kolyvanskoe Lake, 18. VII 2017, 4 ♀♀, MP [FSCV]; Volchikha, 26. VII 2017, 1 ♂, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAFFF598AB1FCD3FDB2.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Om, * No, Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE58FFAFFF598AB1FCD3FDB2.taxon	discussion	REMARK. It is possible that all of the data for this species in Shumakova et al. (1982) are based on a misidentification. See also Megachile bombycina.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFAFFF598D6FFD5CFC22.taxon	description	SPECIMENS EXAMINED. No specimens examined.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFAFFF598D6FFD5CFC22.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Tk, Km,? No,? Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFAFFF598D6FFD5CFC22.taxon	discussion	REMARK. There are two specimens of Megachile circumcincta listed without their sex in Shumakova et al. (1982). Only one of them (a female) collected near Golubtsovo (Altai Terr.) was found in the ISEA collection and belongs to M. ligniseca (Kirby, 1802). It is possible that all of the data for this species in Shumakova et al. (1982) are based on a misidentification. The data in Sarychev and Sarycheva (1989) are not confirmed from preserved specimens, so these data are doubtful too. However, M. circumcincta is a trans-holarctic species, so there is no reason to exclude it from the fauna of Novosibirsk Prov. and Altai Terr., although verification of its presence is needed.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFAFFF598CFEFBE4FB89.taxon	description	[ISEA]; Altai Terr.: Kulundinskoe Lake I, 23. VII 2017, 1 ♀, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFAFFF598CFEFBE4FB89.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * No, * Al. This is the first record from West Siberia.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFAFFF598B97FD56FADE.taxon	description	♂, YD.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFAFFF598B97FD56FADE.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFACFF598A43FBA7FE8B.taxon	distribution	DISTRIBUTION IN WEST SIBERIA.? Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE59FFACFF598A43FBA7FE8B.taxon	discussion	REMARK. There are two specimens of Megachile derasa Gerstaecker, 1869 (currently a junior synonym of M. farinosa) listed without its sex in Shumakova et al. (1982). Only one of them (a female) collected near Bezrukavka (Altai Terr.) was found in the ISEA collection. We examined this specimen and agreed with the previous determination. The documented range of this species is Egypt, Greece, Cyprus, Turkey, Iraq and Iran (Asher & Pickering, 2018). Thus, the observation of this species so far to the east is a very surprising. Because the data in Shumakova et al. (1982) raise a lot of questions, M. derasa is not included in a recent list of Russian Aculeata (Antropov et al., 2017). However, there are no reasons to exclude this species from the fauna of West Siberia, so the record is treated as needing verification.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5AFFACFF598E95FEADFDBA.taxon	description	Altai Terr.: Nikolaevka, 11. VI 2008, 1 ♀, YD [ISEA]; Yarovoe, 30. VI 2011, 1 ♀, YD; Novosibirsk Prov.: Karasuk, 1. VII 2015, 2 ♂, KB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5AFFACFF598E95FEADFDBA.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Om, * No, * AK. This is a first record from West Siberia.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5AFFACFF598D66FCC2FCD6.taxon	description	Tatarka, 17. VI 2012, 2 ♂, AP; Novosibirsk Prov.: Akademgorodok, 8. VII 2011, 1 ♂, AS; idem, 28. VII 2011, 1 ♂, AS; Zoopark, 29. VII 2013, 1 ♂, YD; Kuibyshev, 2. VIII 2015, 2 ♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5AFFACFF598D66FCC2FCD6.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Km, No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5AFFACFF598C4BFC3DFAD5.taxon	description	(Novosibirsk Prov.). SPECIMENS EXAMINED. Russia. Omsk Prov.: Bolshoi Atmas, 30. VII 2015, 5 ♀, AB; idem, 31. VII 2015, 5 ♀, 1 ♂, AB; Novosibirsk Prov.: Inder, 13. VIII 1992, 1 ♀, BR [ISEA]; Karasuk, 31. VIII 2007, 1 ♀, YD [ISEA]; idem, 1. VIII 2011, 1 ♀, AB, 1 ♀, DN; idem, 11. VII 2015, 1 ♀, KB; Evsino, 29. VI 2012, 6 ♀, 4 ♂, AB; Krasnozerskoe, 1. VII 2015, 1 ♀, AB; Suzun, 14. VII 2015, 1 ♂, AB; Zavyalovo, 15. VII 2011, 2 ♀, AS; idem, 19. VII 2011, 1 ♀, AS; Altai Terr.: Yuzhnyi, 8 - 9. VIII 2010, 1 ♀, YD [ISEA]; idem, 9. VIII 2011, 1 ♀, YD [ISEA]; Borovskoe, 22. VII 2011, 1 ♂, AB, 2 ♂, YD; Kolyvanskoe Lake, 25. VII 2011, 10 ♀, 1 ♀, YD; idem, 18. VII 2017, 1 ♀, MP [FSCV]; idem, 27. VII 2017, 1 ♀, MP [FSCV]; idem, 28. VII 2017, 1 ♀, 2 ♂, MP [FSCV]; Kuchukskoe Lake, 28. VI 2016, 1 ♀, 1 ♂, AB; Kulundinskoe Lake I, 23. VII 2017, 4 ♀♀, MP [FSCV]; idem, 24. VII 2017, 2 ♀, 5 ♂, MP [FSCV]; Volchikha, 26. VII 2017, 1 ♀, MP [FSCV]. Kazakhstan. Pavlodar Prov.: Maraldy Lake, 27. VII 2015, 4 ♀♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5AFFACFF598C4BFC3DFAD5.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Km, No, Al, Kh, * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5AFFACFF598A54FC0CF9CC.taxon	description	SPECIMENS EXAMINED. Russia. Omsk Prov.: Tatarka, 17. VI 2012, 1 ♂, KB; Novosibirsk Prov.: Pihtovka, 16. VII 1989, 1 ♂ [ISEA]; Minzelinskoe Lake, 24. VI 1991, 1 ♀, N. Barkalova [ISEA]; Akademgorodok, 24. VI 2015, 1 ♂, YD; idem, 18. VII 2015, 1 ♀, YD; Altai Terr.: Kirova, 28. VI 2007, 1 ♂, YD [ISEA].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5AFFACFF598A54FC0CF9CC.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Tm, Om, Tk, Km, No, * Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5BFFADFF598E03FC2FFE16.taxon	description	Novosibirsk Prov.: Karasuk, 30. VI 2015, 5 ♀, KB; idem, 1. VII 2015, 6 ♀♀, KB; idem, 4. VII 2015, 2 ♀, AB; Altai Terr.: Yuzhnyi, 18. VI 2011, 1 ♀, YD; Melnikovo, 19. VII 2015, 1 ♀, AB; Volchikha, 20. VII 2015, 1 ♀, 1 ♂, AB; Yarovoe, 23. VII 2015, 1 ♂, AB; Kuchukskoe Lake, 26. VI 2016, 1 ♀, 4 ♂, AB; idem, 27. VI 2016, 1 ♀, AB; idem, 22. VII 2017, 1 ♀, MP [FSCV]. Kazakhstan. Pavlodar Prov.: Maraldy Lake, 28. VII 2015, 1 ♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5BFFADFF598E03FC2FFE16.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Km, * No, * Al, * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5BFFADFF598D0BFD3CFBDE.taxon	description	idem, 17. VI 2012, 1 ♂, AB, 1 ♀, KB; Krasnyi Oktyabr, 14. VI 2012, 1 ♀, AP; Novosibirsk Prov.: Boyarka, 15. VI 1987, 1 ♂, BZ [ISEA]; Tandovo Lake, 20. VIII 1997, 1 ♀, BR [ISEA]; Elanka, VI 2009, 1 ♀, Alsinakov [ISEA]; Yuzhnyi, 8. VIII 2010, 1 ♀, YD, AB; idem, 8 - 9. VIII 2010, 5 ♀, YD, AB; idem, 9. VIII 2010, 3 ♀, 1 ♂, YD, AB; Akademgorodok, 2. VIII 2010, 1 ♀, 2 ♂, AB; idem, 21. VIII 2010, 6 ♀, AB; idem, 24. VII 2011, 3 ♀, KB; idem, 23. VI 2017, 1 ♀, KB; idem, 3. VII 2017, 1 ♀, KB; Zavyalovo, 17. VII 2011, 1 ♀, AS; idem, 19. VII 2011, 2 ♀, AS; idem, 22. VII 2011, 2 ♀, AS; idem, 28. VII 2011, 2 ♀, AS; Evsino, 29. VI 2012, 2 ♂, AB; idem, 3. VIII 2016, 1 ♀, KB; idem, 5. VI 2017, 1 ♀, KB; idem, 22. VI 2017, 2 ♀, KB; idem, 6. VII 2017, 3 ♀, 2 ♂, KB; Zoopark, 29. VII 2013, 3 ♀, 2 ♂, YD [ISEA]; Karasuk, 10 - 20. VI 2014, 1 ♂, O. Kosterin [ISEA]; Kuibyshev, 2. VIII 2015, 7 ♀, AB; Altai Terr.: Golubtsovo, 18. VII 1953, 1 ♀ [ISEA]; Kolyvanskoe Lake, 24. VII 2011, 1 ♀, AB; idem, 18. VII 2017, 1 ♀, MP [FSCV]; Volchikha, 26. VII 2017, 1 ♀, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5BFFADFF598D0BFD3CFBDE.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Tk, Km, No, Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5BFFADFF598D0BFD3CFBDE.taxon	discussion	REMARK. See also Megachile circumcincta.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5BFFADFF598B43FCDAF9BA.taxon	description	SPECIMENS EXAMINED. Russia. Omsk Prov.: Tatarka, 25. VI 2011, 1 ♀, AP; idem, 30. VI 2011, 1 ♂, AB, 2 ♀, AP; Bolshoi Atmas, 26. VI 2011, 1 ♀, NH; idem, 28. VI 2011, 3 ♀, AB, 2 ♀, NH, 2 ♀, KB, 3 ♀, AP, 1 ♀, AS; idem; 29. VI 2011, 2 ♀, AB, 2 ♀, AS; idem, 30. VI 2011, 1 ♀, AB; idem, 16. VI 2012, 1 ♂, AB, 1 ♀, KB; idem, 17. VI 2012, 1 ♀, 1 ♂, AB, 1 ♀, 2 ♂, AP; idem, 18. VI 2012, 1 ♂, AB; idem, 30. VII 2015, 1 ♀, AB; idem, 31. VII 2015, 4 ♀, AB; idem, 30 - 31. VII 2015, 1 ♀, AB; Novosibirsk Prov.: Pushkino, 31. VIII 1952, 1 ♀ [ISEA]; Veselovskoe, 27. VI 2015, 1 ♀, AB; idem, 28. VI 2015, 2 ♀, AB; Karasuk, 27. VI 2016, 2 ♀, KB; idem, 9. VII 2016, 1 ♀, KB; idem, 11. VII 2016, 1 ♀, KB; Altai Terr.: Zelenaya Dubrava, 12. VII 1952, 1 ♀ [ISEA]; idem, 15. VII 1953, 1 ♂ [ISEA]; Kirova, 4. VII 2006, 1 ♀, 1 ♂, YD [ISEA]; Volchikha, 29. VI 2011, 1 ♀, NB; idem, 26. VII 2017, 1 ♀, MP [FSCV]; Solonovka, 29. VII 2011, 1 ♀, AB; Yarovoe, 30. VII 2011, 1 ♀, NB; Kolyvanskoe Lake, 16. VII 2015, 2 ♀, AB; Kuchukskoe Lake, 26. VI 2016, 1 ♀, 1 ♂, AB; idem, 27. VI 2016, 1 ♀, AB; Kulundinskoe Lake I, 23. VII 2017, 2 ♀, MP [FSCV]; Rakity, 25. VII 2017, 3 ♂, MP [FSCV]. Kazakhstan. Pavlodar Prov.: Maraldy Lake, 27 - 28. VII 2015, 8 ♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5BFFADFF598B43FCDAF9BA.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Om, No, Al, * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598E03FCB8FE84.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Km, * Al, * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598EA5FC74FDAB.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Tm, No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598EA5FC74FDAB.taxon	discussion	REMARK. Possibly, Megachile maacki Radoszkowski, 1874 (knowing from Tk, Km) represents an Eastern Palaearctic geographic form of M. nigriventris (Praz, 2017).	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598D76FE40FCD9.taxon	description	AB; Altai Terr.: Mihailovskoe, 11. VII 2008, 1 ♀, YD; Yarovoe, 30. VII 2011, 1 ♀, YD; Kulundinskoe Lake I, 23. VII 2017, 2 ♀, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598D76FE40FCD9.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Om, * Al. This is a first record from the territory to the east of the Urals.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598C47FC08FBBD.taxon	description	SPECIMENS EXAMINED. Russia. Omsk Prov.: Solyanoe, 22 - 24. VI 1989, 1 ♀, 1 ♂, Vasilenko [ISEA]; Tatarka, 17. VI 2012, 1 ♂, AB; Novosibirsk Prov.: Karasuk, 1. VII 2015, 1 ♀, KB; Altai Terr.: Belmesevo, 28. VII 2009, 1 ♀, YD [ISEA]; Volchikha, 20. VII 2015, 1 ♂, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598C47FC08FBBD.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Om, Tk, Km, No, * Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598B63FC41FA08.taxon	description	SPECIMENS EXAMINED. Russia. Omsk Prov.: Bolshoi Atmas, 28. VI 2011, 1 ♀, AS; idem, 29. VI 2011, 1 ♀, AB; idem, 12. VI 2012, 1 ♀, KB, 1 ♀, AP; idem, 15. VI 2012, 2 ♀, KB, 3 ♀, AP; idem, 16. VI 2012, 3 ♀, KB, 3 ♀, AP; Tatarka, 13. VI 2012, 1 ♀, AB, 2 ♀, 1 ♂, KB; idem, 17. VI 2012, 1 ♀, 1 ♂, AB, 2 ♀, KB, 1 ♀, 1 ♂, AP; Krasnyi Oktyabr, 14. VI 2012, 1 ♀, KB; Novosibirsk Prov.: Karasuk, 27. VI 2015, 2 ♀, KB; idem, 3. VII 2015, 1 ♀, KB; idem, 15. VIII 2015, 1 ♀, KB; idem, 18. VIII 2015, 1 ♀, KB; Veselovskoe, 10 - 11. VI 2016, 1 ♀, KB; Krasnozerskoe, 15 - 16. VI 2016, 1 ♀, KB; Evsino, 6. VII 2017, 1 ♀, 1 ♂, KB; Altai Terr.: Kuchukskoe Lake, 26. VI 2016, 2 ♀, AB; idem, 20 - 21. VII 2017, 2 ♀, MP [FSCV]; Kolyvanskoe Lake, 28. VII 2017, 1 ♂, MP [FSCV]. Kazakhstan. Pavlodar Prov.: Maraldy Lake, 26 - 27. VII 2015, 1 ♂, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFAAFF598B63FC41FA08.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Tm, Ku, * Om, Km, No, Al, * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFABFF598911FCBFFDF4.taxon	description	1 ♀, KB; Tatarka, 30. VI 2011, 1 ♀, NH; Novosibirsk Prov.: Minzelinskoe, 24. VI 1991, 1 ♂, BR [ISEA]; Akademgorodok, 9. VIII 2009, 1 ♀, AB; idem, 21. VIII 2010, 1 ♂, AB; idem, 8. VII 2011, 1 ♀, AS; Zavyalovo, 19. VII 2011, 1 ♀, AS; idem, 28. VII 2011, 1 ♀, AS; Zoopark, 29. VII 2013, 1 ♂, YD [ISEA]; Gornyi, 11. VI 2015, 1 ♂, AB; Altai Terr.: Yuzhnyi, 5. VII 2006, 1 ♀, YD [ISEA]; idem, 18. VI 2011, 1 ♀, YD; Kirova, 28. VI 2007, 1 ♂, YD [ISEA]; Kolyvanskoe Lake, 24. VII 2011, 1 ♀, YD; Severka, 30. VII 2011, 1 ♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5CFFABFF598911FCBFFDF4.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Tm, * Om, Km, No, Al. Tribe Osmiini Newman, 1834	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598D34FB87FCB2.taxon	description	idem, 14 - 17. VI 2012, 1 ♂, YD; Novosibirsk Prov.: Evsino, 4. VI 2016, 1 ♂, KB; idem, 5. VI 2017, 1 ♂, KB; Akademgorodok, 23. VI 2017, 2 ♂♂, KB; Altai Terr.: Yuzhnyi, 18. VI 2011, 2 ♀, 2 ♂, YD.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598D34FB87FCB2.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Tk, Km, * No, Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598D34FB87FCB2.taxon	discussion	REMARK. Proshchalykin (2013 b) listed this species for Biysk (Altai Terr.), although the specimen originated from the Altai Republic. The [Biysk] on the specimen label refers to Biysk Uezd, an administrative unit in the Tomsk Guberniya of the Russian Empire.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598C6DFD86FBB7.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku,? No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598C6DFD86FBB7.taxon	discussion	REMARK. The species is listed for the Novosibirsk environs (Sarychev & Sarycheva, 1989). It is not possible to locate this material. Heriades truncorum is a trans-palaearctic species, so there is no reason to exclude it from the fauna of Novosibirsk Prov., but verification of the record is needed.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598B68FC20FB05.taxon	description	Novosibirsk Prov.: Chany Lake, 12. VI 1988, 1 ♂ [ISEA]; idem, 13. VI 1988, 1 ♀ [ISEA]; Akademgorodok, 14. VI 2017, 1 ♀, KB; Altai Terr.: Yuzhnyi, 24. VI 2001, 1 ♂, YD [ISEA].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598B68FC20FB05.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Tk, Km, * No, * Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598A1AFCCFFA4B.taxon	description	idem, 16. VI 2012, 1 ♀, AB; Novosibirsk Prov.: Akademgorodok, 14. VI 2017, 1 ♂, KB; Chany Lake, 13. VI 1988, 2 ♀ [ISEA]; idem, 20. VI 1988, 1 ♀ [ISEA].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598A1AFCCFFA4B.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Km, * No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598AD4FD31F9BC.taxon	description	2015, 1 ♀, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5DFFABFF598AD4FD31F9BC.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Pa.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598E03FC20FE29.taxon	description	idem, 14. VI 2012, 1 ♂, KB; idem, 16. VI 2012, 2 ♀, AP; idem, 14 - 17. VI 2012, 1 ♀, YD; Tatarka, 17. VI 2012, 1 ♀, AB; Novosibirsk Prov.: Karasuk, 12. VII 2015, 1 ♀, KB; Evsino, 4. VI 2016, 1 ♀, KB; Krasnozerskoe, 13 - 14. VI 2016, 1 ♀, KB; Akademgorodok, 14. VI 2017, 1 ♀, KB; Altai Terr.: Kolyvanskoe Lake, 24. VII 2011, 1 ♂, AB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598E03FC20FE29.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. * Om, Tk, Km, * No, * Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598EF0FC14FD44.taxon	description	SPECIMENS EXAMINED. Russia. Omsk Prov.: Krasnyi Oktyabr, 25. VI 2011, 1 ♀, AB; Bolshoi Atmas, 12. VI 2012, 1 ♀, KB, 1 ♂, AP; idem, 14 - 17. VI 2012, 1 ♀, YD; Novosibirsk Prov.: Evsino, 5. VI 2017, 1 ♀, KB; Altai Terr.: Yuzhnyi, 8 - 9. VIII 2010, 1 ♀, YD, AB; idem, 24. VI 2011, 1 ♀, 1 ♂, YD.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598EF0FC14FD44.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, * Om, Tk, Km, No, * Al.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598DE4FC16FC6B.taxon	description	♀, KB.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598DE4FC16FC6B.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Tm, Ku, Om, Tk, Km, * No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598CB6FCB4FBD1.taxon	description	1 ♀, BR [ISEA].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598CB6FCB4FBD1.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Tk, Km, * No.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598A06FC74FA36.taxon	description	[ISEA]; Akademgorodok, 12. V 2017, 8 ♀, KB; idem, 1. VI 2017, idem, 2 ♀♀, KB; idem, 14. VI 2017, 1 ♀, KB; Gornyi, 17. VI 2017, 1 ♀, YD.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598A06FC74FA36.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Ku, Km, * No. SPECIES EXCLUDED FROM THE FAUNA OF WEST SIBERIA	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598B48FCD8FB1B.taxon	description	♀, KB; Altai Terr.: Kolyvanskoe Lake, 18. VII 2017, 1 ♀, MP [FSCV].	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA8FF598B48FCD8FB1B.taxon	distribution	DISTRIBUTION IN WEST SIBERIA. Tk, Km, * No, Al, Kh.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5EFFA9FF598AEAFDBCFE7C.taxon	discussion	REMARK. The species is listed for Novosibirsk (Sarychev & Sarycheva, 1989) and Barnaul (Danilov, 2006). It is not possible to locate these specimens. These localities are very far to the east from the known borders of the species distribution: Greece, Turkey, Lebanon, Israel, Syria, Jordan, Dagestan Republic (Russia) (Asher & Pickering, 2018). Verification of the record is needed.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
039F87A1CE5FFFA9FF598EA3FD33FD22.taxon	discussion	REMARK. Lavroff (1927) listed this species for the Omsk environs without data on specimens but noted that observations were made mainly in August. It is possible that most of his Lithurgus specimens were males with faded pubescence, which can cause them to be misidentified as L. chrysurus. Males of these species are easily distinguished by the shape of sternum 6 – widely rounded apically in L. cornutus and narrowed apically, nearly triangular in L. chrysurus. Although the observation of Lavroff may be based on misidentification, the occurrence of L. chrysurus in the West Siberian steppes is possible because it was listed for the Central Asian part of the former USSR (Banaszak & Romasenko, 2001), although verification of its presence in West Siberia is needed.	en	Byvaltsev, A. M., Belova, K. A., Danilov, Yu. N., Molodtsov, V. V., Proshchalykin, M. Yu. (2018): Megachilid bees (Hymenoptera: Megachilidae) of the forest-steppe and steppe zones of the West Siberian Plain to the eastward of Irtysh River. Far Eastern Entomologist 364: 10-28, DOI: 10.25221/fee.364.3, URL: http://dx.doi.org/10.25221/fee.364.3
