Barsine vinhphucensis Spitsyn, Kondakov, Tomilova, Pham & Bolotov, 2018

(Figs 41–42, 54, 74)

Barsine vinhphucensis Spitsyn et al. 2018: 20, figs 1–2 (Type locality: “ VIETNAM: Vinh Phuc Province, Phuc Yen District, Ngoc Thanh Commune, Tam Dao Mountain Range, Me Linh Station, ... 21°23.050’N, 105°42.740’E, 370 m alt.”).

Material examined. CHINA. 2 ♂, 7.VIII.2003, Rongshui Miao Autonomous County, Guangxi Zhuang Autono- mous Region, P. R . China, leg. Min Wang (SCAU) ; 1 ♂, 15. V .1999, altitude 400 m, Luoxiang Village, Jinxiu Yao Autonomous County, Guangxi Zhuang Autonomous Region, P. R . China, leg. De-cheng Yuan, IOZ (E) 473578 (IZ- CAS) ; 1 ♂, same locality, but altitude 450 m, 30. VI . 2000, leg. Wen-zhu Li, IOZ (E) 473575 (IZCAS). VIETNAM. 1 ♂, altitude 253 m, 12.IX.2014, Cuc Phuong National Park, Ninh Binh Province, 20°17.580′ N, 105°40.017′ E, leg. G. Martin, NHMUK unique number NHMUK010604721, slide NHMUK010314226 Volynkin (NHMUK).

Diagnosis. Externally, B. vinhphucensis is similar to the nominate subspecies of B. sieglindae Černý, 2016 described from central Laos (Černý 2016). However, it can be distinguished from the latter by its slightly larger size (in B. vinhphucensis the forewing length is 13–15 mm, while in B. sieglindae sieglindae that is 12 mm), reddish area on hindwing upperside not reaching the dorsum (in B. sieglindae sieglindae the red area always reaches the dorsum). Compared to B. sieglindae sieglindae, the ♂ genitalia of B. vinhphucensis are characterized by the valva being stouter and broader (longer and narrower in B. sieglindae sieglindae), shorter sacculus, costa with an additional spiny basal process (such a process is absent in B. sieglindae sieglindae, only a medial costal process is present), and aedeagus vesica bearing smaller cornuti.

Distribution. China * (N Guangxi Zhuang Autonomous Region) and N Vietnam (Spitsyn et al. 2018).