Trachyusa vasilisk Belokobylskij, 1998

Figs 13–14

Trachyusa vasilisk Belokobylskij, 1998: 293; Yao et al. 2015: 581.

Material. 1♀ (ZJUH), “ [SE. China:] Guizhou, Mt. Leigong, 1.vi.2005, Liu Jingxian, No. 200606658” ; 1♀ (NWUX), NW China: Shaanxi, Qinling Mts, Taiping Nat. Park, 600–1500 m, 31.v.2015, 34°55’40”N 108°39’28”E, Jiangli Tan ; 1♀ 1♂ (RMNH), NW China: Shaanxi, Qinling Mts, Luonan, Luoyuan, c. 1350 m, 28.v.2016, swept, N34°12’, E109°50’, Jiangli & Qingqing Tan ; 2♂ (NWUX, RMNH), NW China: Shaanxi, Xunyangba, Ningshan, c. 1300 m, vii.2014 & 30.ix.2014, 33°33’N 108°32’N, Jiangli Tan ; 1♂ (NWUX), NW China: Shaanxi, Liping Nat. Forest Park, along road between Hongchenxia-Sicheng, 32°47’N 106°40’E, c. 1490 m, 21.vi.2015, J-L. Tan ; 1♂ (NWUX), NW China: Shaanxi, Huanghualing, Zhashui, 1408 m, yellow [Malaise] trap, 20.v.–1.vii.2016, N33.80°, E108.88°, J-L & Q-Q Tan .

Short redescription. Body dark brown (Fig. 13); ♀, length of body 3.1 mm, of fore wing 3.3 mm; eye in lateral view 1.3 × higher than wide; frons flat and smooth; vertex rather convex; OOL:diameter of ocellus:POL= 7:4:5; face 1.3 × wider than high, rather evenly convex, with some long setae and punctures (Fig. 14I); clypeus semicircular and medium-sized, rather flat, with some punctures (Fig. 14J); length of malar space 0.35 × basal width of mandible; first and third teeth of mandible small, middle tooth wide and acute, distinctly longer than lateral teeth and with orthogonal protuberance on upper margin (Figs 14L–M); notauli only impressed anteriorly on disc, crenulated and narrow (Fig. 14D); medio-posterior depression of mesoscutum medium-sized to long; middle lobe of mesoscutum with medium-sized setae, lateral lobes largely glabrous (Fig. 14D); mesoscutum slender and 1.1 × longer than wide; surface of propodeum densely and coarsely reticulate-rugose, areola absent (Fig. 14E); pterostigma elliptical; vein r 0.6 × width of pterostigma; cu-a postfurcal (Fig. 14A); hind coxa smooth or rugulose (Fig. 14D); setose part of ovipositor sheath 0.05 × as long as fore wing (total 0.09 times), flattened and setose basally and 0.2 × as long as hind tibia (Fig. 14G).

Variation. Length of body 2.4–3.4 mm and of fore wing 2.6–3.3 mm; antenna of ♀ with 30(3) antennomeres; pterostigma of ♂ strongly enlarged and antenna with 28(1), 29(2), 30(1), 32(1) antennomeres.