Streblocera (Eutanycerus) okadai Watanabe 1942

Streblocera (Eutanycerus) okadai Watanabe, 1942 Streblocera okadai Watanabe, 1942: 10; Maeto and Nagai 1985: 729. Streblocera (Cosmophoridia) okadai; Chou, 1990: 100; Chao 1993: 66. Streblocera (Eutanycerus) okadai; Chen and van Achterberg, 1997: 117; Belokobylskij 2000: 296. Streblocera okadai; Li et al., 2020: 753. Streblocera okadai; Long & Pham, 2020: 403. Streblocera orientalis Chao, 1964: 154. Synonymised by Chao, 1993. Streblocera zhongmouensis J. Wang, 1982: 61. Synonymised by Chao, 1993. Streblocera shaanxiensis C. Wang, 1984: 411. Synonymised by Chao, 1993. Streblocera flava You and Xiong, 1988: 167. Synonymised by Chao, 1993. Notes. This species was described and diagnosed by Watanabe (1942) and keyed in Belokobylskij (2000b) and Li et al. (2020). Here we only provide distinguishable characters of the species in the key and in-country distribution of the species. Diagnostic characters. Antenna with 19–22 antennomeres; scapus with tooth-shaped horn basally, 6.1× as long as its maximum width (see Fig. 10B in Li et al. 2020); seventh flagellomere geniculate; first flagellomere 1.4× as long as second flagellomere (see Fig. 10C in Li et al. 2020); first to seventh flagellomeres straight ventrally; sixth–seventh flagellomeres with hook apico-ventrally; combined length of eighth flagellomere and following flagellomeres longer than scapus; propodeum sometimes with rather short basal carina. Distribution. NW Vietnam: Hoa Binh (Yen Thuy), Ninh Binh (Cuc Phuong NP) (Fig. 21). Outside Vietnam known from China, Japan, Korea, Russia (Far East).