14. Cothornobata mentogensis sp. nov.

(Fig. 18)

Diagnosis. Frontal vitta blackish-brown with dark yellow apex. Scutellum flat, directed posteriorly. Bm-cu proximal to CuA2. Arms of genital fork subparallel basally and convergent on distal 1/3, basal tubercle finger-like, close but not contiguous, medial tubercle low and indistinctly convex. Distiphallus inflated apically, glans absent. Pregonite finger-like, apex bare. Postgonite broad and horn-like.

Description. Male. Body length 9.5 mm, wing length 6.5 mm.

Head mostly subshiny blackish with very thin gray pollinosity. Frontal vitta blackish-brown with dark yellow apex, densely microsetulose, about 1/2 width of frons; lower orbital plate dull pollinose; ocellar triangle black; median occipital sclerite with a small dark yellow spot at middle; lunule dark yellow; face pale yellow, densely microsetulose; gena yellow, lightly pollinose; clypeus uniformly brown, shiny. Setae and setulae on head black; postgena with 1 strong seta at lower margin. Antenna brownish-yellow; first flagellomere 1.6X as long as broad; pedicel with 1 ventral apical setae more than half length of first flagellomere; arista nearly 3.6X length of first flagellomere, blackish-brown except base brownish-yellow, bare. Proboscis dark yellow, setulae dark brown. Palpus yellow, setulae black.

Thorax blackish, with pale gray pollinosity. Scutellum flat, directed posteriorly. Setae on thorax black, setulae blackish; katepisternum with 3 strong setae.

All legs absent from the the only known specimen. Fore coxa yellow, mid and hind coxae brownish-yellow.

Wing brown with distal and discal bands dark brown; distal band basal to middle of distal section of M1; discal band along M1 and anterior to R4+5, basal to middle of penultimate section of M1. Bm-cu proximal to CuA2, A1+CuA2 2.3X as long as CuA2; distance between apex of R2+3 and R4+5 0.6X as long as M1 beyond dm-cu (Fig. 18 C). Halter pale yellow but dark yellow at base.

Abdomen mostly blackish-brown, lightly pollinose, tergites 2–4 pale yellow with pale gray pollinosity apically. Pleuron pale gray. Epandrium brownish-yellow. Genital fork dark brown, with blackish-brown to black setulae; arms subparallel basally and convergent on distal 1/3, basal tubercle finger-like, close but not contiguous; medial tubercle low and indistinctly convex (Fig. 18 D). Distiphallus longer than phallapodeme, not inflated apically. Pregonite long and slender, finger-like. Postgonite broad and horn-like, directed posteriorly (Fig. 18 GH).

Female. Unknown.

Type material. HOLOTYPE: CHINA, Tibet: Nyingchi, Mentog, 1000 m, 26.vii.2012, Wenliang Li (♂, CAU).

Distribution. Oriental: China (Tibet).

Remarks. Cothornobata mentogensis is similar to C. curva sp. nov., but differs as follows: scutellum flat, directed posteriorly; genital fork with basal tubercles finger-like, not contiguous; distiphallus inflated apically, glans absent; pregonite finger-like, apex bare; postgonite broad.

Etymology. The specific name refers to the type locality, Mentog.