Bayadera hatvan Hämäläinen & Kompier, 2015

(Fig. 6a–e)

Bayadera hatvan: Hämäläinen & Kompier (2015), pp. 15–19, Figs 1, 3–5 [Holotype from Yen Bai Prov., paratypes from Yen Bai, Ha Giang and Cao Bang Provinces].

Materials examined. [Vietnam] 2♂, Ha Giang Prov., 1.VII.2014, T. Kompier (TKC) ; 1♂ 1♀, Thanh Cong, Nguyen Binh, Cao Bang Prov., 17.V.2015, Q.T. Phan and F. Hayashi leg. (PQTC) ; 1♂, Tu Le, Mu Cang Chai, Yen Bai Prov., 19.V.2014, Q.T. Phan leg. (PQTC) ; 1♂, Nam Bung, Yen Bai Prov., 11.V.2014, T. Kompier leg. (TKC).

Other materials confirmed by field observations. [Vietnam] 15 exs, Cao Bang Prov., 18.VI.2015, T. Kompier ; 1♂, Cao Bang Prov., 27.VI.2015, T. Kompier; Some individuals, Yen Bai Prov., V, VI, VII.2014, VI, VII.2015, VII.2016, VII.2017, T. Kompier.

Notes. Bayadera hatvan resembles B. indica (Selys, 1853) . In both species the tip of cerci is dilated in the form of a triangle, the inner sides have a robust spine near the base and two tubercles besides the robust spines (Fig. 6b– c). Wings (Fig. 6d) are hyaline, but darkened at the tip. Female resembles the male in thoracic marking; posterior lobe of prothorax has two short processes (Fig. 6e). Hämäläinen & Kompier (2015) presumed that specimens from Yunnan, southern China, identified by Davies & Yang (1996: p. 152, Figs 26–28) as Bayadera indica are likely to be B. hatvan rather than B. indica . A re-evaluation of Chinese specimens should resolve this matter.

Distribution. Vietnam (Ha Giang, Cao Bang and Yen Bai Provinces).