Monolepta flavofasciata Jacoby, 1889

Hazmi, Izfa Riza & Wagner, Thomas, 2022, Revision of Monolepta Chevrolat, 1836 from the Sundaland area (Coleoptera: Chrysomelidae: Galerucinae), Bonn zoological Bulletin 71 (2), pp. 139-176 : 153-155

Monolepta flavofasciata Jacoby, 1889

Figs 21–23 .

Monolepta flavofasciata Jacoby, 1889: 229 .

Type material. Jacoby mentioned at least two specimens “Bhamoó, August 1885, also Pulo Penang (coll. Jacoby)” in his original publication. One syntype is available in MCGD “ Bhamo , Birmania, Fea VIII.1885 / flavofasciata Jac. / Monolepta flavofasciata Jac ”. The specimen from MCZH ( Fig. 22 ) is not a type, since col- 154 Izfa Riza Hazmi & Thomas Wagner

leted later and from another locality, but is surely conspecific.

Further material examined. – India. 2 ex., Assam, Palkai , 26º12′ N / 92º56′ E, Fry Coll. 1905.100, Doherty ( BMNH) . – Malaysia. 1 ex., Island of Penang, 5º15′ N / 100º29′ E, Baker ( NHRS) ; 1 ex., Penang, 5º15′ N / 100º29′ E, G. E. Bryant, XI.1913 ( BMNH) ; 1 ex., Malay Penin. Kedah, Alor Star, Gunong Keriang , 6º11′ N / 100º19′ E, 1.IV.1928 ( UKM) ; 1 ex., Ma- lay Penin., West Coast , Langkawi Is., 6º21′ N / 99º48′ E, 25.IV.1928 ( BMNH) ; 1 ex., Perak, Tapah, Lata Iskandar , 4º19′ N / 101º19′ E, 3.–4.IV.1990, Zaidi, Ismail, Ruslan ( UKM) ; 1 ex., Pahang, Pulau Tioman , 2º47′ N / 104º08′ E, 16.–18. VIII.1994, Ismail & Jazmi ( UKM) ; 1 ex., Kedah, P. Langkawi, Lubuk Sembilang , 6º21′ N / 99º48′ E, 20. V.1995, Ismail, Ruslan & Sham ( UKM) ; 2 ex., Perlis, Taman Negeri Wang Klian , 6º40′ N / 100º11′ E, 29.IX.– 4.X.1999, Zaidi, Ismail, Azman ( UKM) . – Thailand. 1 ex., E. Thailand, Nakhon Ratchasima Prov., Sakaerat Biosphere Reserve , 14º30′ N / 101º55′ E, VI.1995, Ghazoul & Inward ( BMNH) .

Redescription

Total length. 4.30–5.80 mm (mean 5.05 mm; n = 0).

Head. Very finely punctuated and entirely pale yellow. Labrum and mandible black.Antenna slender and extending almost to the middle of the elytra, pale yellow and

only terminal antennomere partly brownish ( Fig. 22b , 23A ). Third antennomere slightly longer than second; ratio length of second to third antennomere 0.75–1.00 (mean 0.88); ratio length of third to fourth antennomere 0.44–0.50 (mean 0.47; Fig.23B ).

Thorax. Pronotum very finely punctuated, entirely pale yellow, parallel-sided and a bit widened posteriorly. Pronotal width 1.40–1.80 mm (mean 1.60 mm), ratio length to width 0.56–0.58 (mean 0.57). Scutellum, meso- and metathorax black. Elytron finely punctuated, black with a broad yellowish transverse band beyond the middle and brown-reddish band in the apical part ( Figs 22b , 23A ). Elytral length 3.40–4.60 mm (mean 4.00 mm), maximal width of both elytra together 2.50–3.30 mm (mean 2.90 mm), ratio of maximal width of both elytra together to length of elytron 0.72–0.74 (mean 0.73). Foreleg yellow, mid and hindlegs blackish ( Fig. 22b ).

Female genitalia. Spermatheca with small spherical nodulus with broad ridge, long and curved cornu ( Fig 23D ). Bursa sclerites small and slender ( Fig. 23E ).

Diagnosis. Elytral colouration of M. flavofasciata is very characteristic by its broad black base, a small transverse yellow band around the middle, followed by a broader transverse black band that is reaching the outer elytral margin, and a reddish elytral apex. Most similar in elytral colouration is M. orientalis , but with brown-reddish elytra with broad yellowish transverse band in the middle, bounded above and below by a narrow black band, and another narrow black band is placed across the basal margin ( Figs 19b , 20A , 22b , 23A ). The genitalic characters of both species are very different in both sexes ( Figs 20C–E , 23C–E ).

Distribution. Known from East-India, Myanmar and Thailand to the Malayan Peninsula ( Fig. 21 ).

Figures

Fig. 21. Distribution of Monolepta orientalis Jacoby, 1889 and M. flavofasciata Jacoby, 1889.

Fig. 22. Material of Monolepta flavofasciata Jacoby, 1889, no type, but collected nearby type locality at same time (MCZH).

Fig. 23. Monolepta flavofasciata Jacoby, 1889. A. Colour pattern. B. Basal antennomeres. C. Median lobe, a. dorsal, b. lateral, c. ventral, without endophallic structures. D. Spermathecae. E. Bursa-sclerites, a. dorsal, b. ventral.

Fig. 19. Type material of Monolepta orientalis Jacoby, 1889, syntype (MCZH).

Fig. 20. Monolepta orientalis Jacoby, 1889. A. Colour pattern. B. Basal antennomeres. C. Median lobe, a. dorsal, b. lateral, c. ventral, without endophallic structures. D. Spermathecae. E. Bursa-sclerites, a. dorsal, b. ventral.