New taxa and new records of butterflies from Vietnam (Lepidoptera, Papilionoidea) Author Monastyrskii, Alexander L. 0000-0001-7645-2458 Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam https: // orcid. org / 0000 - 0001 - 7645 - 2458 & Fauna & Flora International, Vietnam Programme, Ha Noi, Vietnam Author Lien, Vu Van 0000-0001-7645-2458 Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam https: // orcid. org / 0000 - 0001 - 7645 - 2458 & vulien @ gmail. com; https: // orcid. org / 0000 - 0003 - 2389 - 9402 vulien@gmail.com text Zootaxa 2021 2021-10-08 5048 4 486 510 journal article 4048 10.11646/zootaxa.5048.4.2 ad9f7049-4351-4deb-945a-409f9bbb5076 1175-5326 5556598 6A450390-1C69-42CD-9682-2A766CB31338 Ragadia latifasciata cristata Monastyrskii & Vu , subspec. nov. ( Figs. 8 , 9 ) Description: Male. Length of forewing: HT 22.5 mm. ♂ Upperside ( Figure 8A ). Ground colour of both wings blackish with a broad, white postdiscal band broadened at dorsum on the forewing and to the costal edge on the hindwing; on the forewing the band ends at vein M 1 . Basal and sub-basal whitish fasciae on the forewing are indistinct. Underside ( Figure 8B ). Both wings ground colour blackish with broad postdiscal white band and well distinct basal, sub-basal and submarginal whitish fasciae. Forewing with series of submarginal eye spots including spots in cells from Cu 1b (double spot) to R 4 (single spots in all other cells); hindwing with series of subterminal eye ringed spots spreading from cell Cu 1b to Rs; spot in cell M 1 is absent. Female: length of forewing: PTs 24.0; 24.5; 25 mm . ♀ ( Figure 8C, D ) The female is slightly larger than the male with a convex terminal edge on the forewing; wing patterns on both surfaces are similar to that in the male. The most conspicuous character is the absence of an eye spot in cell M 1 of the hindwing. Male genitalia. ( Figure 9 ). Uncus long, slender and gradually tapering at tip; uncus in 1.5 times longer than tegumen and pointed towards the tip; gnathos is ½ of the uncus length and pointed towards the end; saccus relatively long but shorter than valvae; phallus long with hooked bend at the tip; valvae elongated with the round apex and small and small spike at upper side. Diagnosis. Specimens recently collected in Ha Giang province are similar to the ♂ and ♀ R. latifasciata type specimens described from Moupin [Baoxing, Sichuan ] (W. China ) and deposited in the NHM. It is definitely a rare species that has not been collected or mentioned since Leech’s (1892–94) publication of the species description. Recently, the taxon latifasciata was misidentified as a subspecies of R. crisilda in Lang (2017) and has been regarded as a form of R. crisilda . However, type specimens of latifasciata from China and the recent discovery from Ha Giang bear no resemblance to R. crisilda , which has a complete series of submarginal spots on the hindwing underside. The wing patterns of R. latifasciata are similar to those of R. critias Riley & Godfrey, 1921 from central Vietnam , which can be easily distinguished from specimens from the type locality (N. Thailand ) and from Southern China ( Yunnan province , near the border to Vietnam ). At the same time, the male genitalia of latifasciata from N. Vietnam and critias from C. Vietnam , Thailand and S. China show high similarity ( Figures 10 ). Considering these observations, we suggest a revision of these species. Type material: Holotype : NORTHERN VIETNAM , ♂ Ha Giang province , Dong Van district , Yen Minh commune, VI.2015 , local collector leg . Paratypes ♀ the same location and date as holotype , local collector leg .; ♀ the same location as holotype, VI.2009 , HVT leg .; ♀ Ha Giang province , IV–V.2007 , local collector leg . Distribution. The new taxon is known only from Ha Giang province (northern Vietnam ), though it may occur in southern China .