2. Rhodostrophia jacularia (Hübner, [1813])

(adults Figs. 19B, 58B; male gen. Figs. 39A–39C; female gen. Fig. 49H)

Rhodostrophia jacularia: Viidalepp, 1976: 850; 1996: 57; Vasilyeva, 1989: 105; Berlov & Berlov, 2006: 103; Gordeeva & Gordeev, 2007: 127; Mironov et al., 2008: 210 (region 26: “?”, region 27); Beljaev & Mironov, 2019: 276.

Material examined. Irkutskaya Oblast: Tazheranskaya steppe, 10. VI.2020, 3 ♁; Kurkut, 10. VI.2016, 1 ♁ (GenBank ID: MZ148345), I. Makhov [ZIN]; Ryty, 17. VI.2010, 1 ♁; same loc., 29. VI.2010, 1 ♁, O. Berlov [EB]. Buryatia: Onokhoy-Shibir’, 14. V.2008, 2 ♁; same loc., 4. VI.2007, 1 ♁, T. Gordeeva [ISEA]; Shamanskiye gory, 10. VI.2008, 1 ♀, T. Gordeeva; Begul, 29. VI.1993, 2 ♁, S. Rudykh [IGEB]; “Irkut”, no date, 23 ♁ (unknown collector) [ZIN]. Tuva Republic: Erzinsky Distr., southern shore of Tore-Khol Lake, semidesert, h= 1250 m.a.s.l., 18–19. VI.2001 , 1 ♀, P. Ustjuzhanin [ISEA].

Distribution. Central Palaearctic, subboreal. Volga–Don region, Lower Volga region, southern part of Krasnoyarsky Kray, Khakassia, Altai, Tuva, Irkutskaya Oblast, Republic of Buryatia, Zabaikalsky Kray. Outside Russia in Turkey, N Kazakhstan, Mongolia, NW China.

Hostplants: T. Gordeeva bred caterpillar in Buryatia on Goniolimon speciosum (personal communication).

Remarks. This species is rather variable in appearance across its range that is shown in details by Sihvonen & Nupponen (2005). Some colour forms have been described as separate species, i.e. Rhodostrophia tyugui Vasilenko, 1998 and R. ustjuzhanini Vasilenko, 2006 . I collected a male in Southern Mongolia which lacks dark wing pattern (Fig. 31B) and is similar in appearance to specimen from Altai Mountains illustrated in Sihvonen & Nupponen (2005). Analysis of the genitalia structure of this Mongolian sample revealed no significant differences from R. jacularia . Females demonstrate different extent of wings reduction: according to Sihvonen & Nupponen (2005), in a mountain population in the Russian Altai near the Chinese and Mongolian border they are incapable of flying.