Diplonevra furcavectis sp. nov.

(Figs. 25, 26, 45, 61)

Male: Head. Frons black, subshining, with 40–50 scattered hairs. Mean frontal width 0.48 of head width. First row of bristles straight, antials further apart than either from an anterolateral. Second row of bristles slightly concave, pre-ocellar bristles closer than either is from a mediolateral. Supra-antennal bristles well below antials and close each other. Postpedicel brown, spherical with pointed tip. Palpus yellow brown and 3 times as long as its breadth, with 4 bristles on ventral apex. Proboscis pale yellow. Thorax. Scutum and scutellum dark brown, Notopleuron with 3 bristles. Scutellum with 4 bristles. Legs brown. Front tibia lacking dorsal bristle and differentiated hairs; front tarsomere 5 widened. Mid tibia with 2 longitudinal hair palisades, anterodorsal one straight and extending to 1/4 (0.27) of tibia. Posterior face of hind trochanter with 4 biforked bristles on ventral region. Posterior face of hind femur with 6–8 bristles and several hairs, with an ascending process bearing 3 long hairs apically. Hind tibia with 2 palisades, lacking anterodorsal bristles. Wing 1.05 mm long. Costal index 0.48. Costal ratios 4.5: 1:1. Costal cilia 0.05 mm long. Vein M1 curved. Axillary ridge with 4 axillary bristles. All veins brown and membrane yellowish brown. Haltere brown. Abdomen. Tergites dark brown Venter dark grey. Hypopygium dark brown. Left side of epandrium narrow with 16–18 long hairs. Right side of epandrium broad, with about 18–20 long hairs toward posterior margin. Hypandrium tomentose, without bristles. Circus pale yellow and stalk of circus yellow brown.

Female. Unknown.

Distribution. China (Ningxia).

Etymology. The specific epithet refers to the biforked bristles of posterior face of hind trochanter.

Holotype: ♂, Ningxia, Liupan Mountain (35°47′N, 106°17′E), 21–Jun–2008, Hong Fang ; paratype: 1 ♂, same data as holotype .

Remarks. The species is distinguished from other species of the genus by biforked bristles on posterior face of hind trochanter.