Euphaea decorata Selys, 1853

Euphaea decorata Selys, 1853 View in CoL

( Fig. 13a–b View FIGURE13 )

Euphaea decorata: Selys (1853) View in CoL , p. 51; Martin (1904), p. 218 [‘Looks very common in Tonkin’]; van Tol & Rozendaal (1995), p. 100 [Specimens from Tam Dao National Park, Vinh Phuc Prov.]; Hämäläinen (2004), pp. 393–394; Do & Dang (2007), p. 34, distribution map [Records from Lang Son, Vinh Phuc, Ha Tinh and Quang Ninh Provinces]; Wilson & Zaifu (2007), pp. 93, 120; Zhang (2010), p. 25 (species list); Phan et al. (2011), Figs 38–41, pp. 27–28 [Specimens from Phu Tho Prov.].

Materials examined. [ Vietnam] 2♂, Tu Le , Yen Bai Prov., 19.V.2014, Q.T. Phan leg. ( PQTC) ; 1♂, Nam Bung , Yen Bai Prov., 11.V.2014, T. Kompier leg. (TKC) ; 1♀, Xuan Son National Park , Phu Tho Prov., 16.IX.2015, Q.T. Phan leg. ( PQTC) ; 4♂ 2♀, Cham Chu, Ham Yen , Tuyen Quang Prov., 12.VII.2015, Hoang Vu Tru leg. ( PQTC) . [ China] 2♂, Chebaling, Shixing, Shaoguan , Guangdong Prov., 04.X.2008, X. Yu leg. ( PQTC) ; 1♂ 1♀, Shenzeng , Guangdong Prov., 9–10.VII.2016, F. Hayashi leg. (FHC) ; 1♂ 1♀, Hong Kong , 11–12.VII.2016, F. Hayashi leg. (FHC) ; 2♂, Damingshan , Guangxi Prov., 6.VI.2014, F. Hayashi leg. (FHC) ; 1♂, Jinhuacha , Guangxi Prov., 7.VI.2014, F. Hayashi leg. (FHC) ; 1♂ 1♀, Shiwandashan , Guangxi Prov., 9.VI.2014, F. Hayashi leg. (FHC).

Other materials confirmed by field observations. [ Vietnam] Some individuals, Ha Giang Prov. , VII.2014, T. Kompier; Some individuals, Cao Bang Prov. , VI, VII.2014, V, VI, IX, X.2015, T. Kompier; Some individuals, Lang Son Prov. , VI.2014, V, VI, VII, X.2015, T. Kompier; 15 exs, Thai Nguyen Prov. , 15.VI.2015, T. Kompier ; 1♂, Bac Giang Prov., 22.VI.2015, T. Kompier; Some individuals, Yen Bai Prov., V, VI, VII.2014, V, VI, VII, X.2015, VII.2016, T. Kompier; Some individuals, Xuan Son National Park , Phu Tho Prov. , X.2013, V, VI, VII, IX, X, XI.2014, V, VI, VII, VIII, IX, X.2015, V, VII, VIII.2016, T. Kompier; 5 exs, Hoa Binh Prov. , 27.VI.2014, T. Kompier; Some individuals, Tam Dao National Park, Vinh Phuc Prov. , VIII, IX.2013, VI, VII.2014, VII.2015, T. Kompier; 25 exs, Vinh Phuc Prov. , 16.VIII.2015, T. Kompier; 4 exs, Ba Vi National Park, Ha Noi City, 14.IX.2013, T. Kompier; 15 exs, Quang Ninh Prov. , 25.VI.2017, T. Kompier; 50 exs, 8–9.VII.2017, Bac Kan Prov. , T. Kompier.

Notes. This species is widely distributed in northern Vietnam and is often abundant. Synthorax of male black with yellow stripes that become entirely obscured with age ( Fig. 13a View FIGURE13 ). Male FW are hyaline, but the HW are black from the nodus outward for about three-fifths of the wing distal of the nodus, the apex hyaline. In the female the wings are tinged amber ( Fig. 13b View FIGURE13 ).

Distribution. Vietnam ( Ha Giang, Cao Bang, Bac Kan, Lang Son, Thai Nguyen, Bac Giang, Quang Ninh, Yen Bai, Phu Tho, Hoa Binh, Tuyen Quang, Vinh Phuc, Ha Noi and Ha Tinh Provinces) ( Do and Dang 2007, this study), China ( Hubei, Zhejiang, Jiangxi, Fujian, Guangdong, Hong Kong, Guangxi and Yunnan Provinces) (van Tol & Rozendaal 1995, Hämäläinen 2004, Zhang 2010).