Nepalomyia guangxiensis Zhang and Yang

Zhang, Lili & Yang, Ding, 2005, Species of Nepalomyia (Diptera: Dolichopodidae) from Guangxi, China, with a key to Palaearctic and Oriental species, Zootaxa 1058, pp. 51-60 : 54-56

Nepalomyia guangxiensis Zhang and Yang , sp. nov.

( Figs. 1–3 )

Diagnosis. Belonging to henanensis ­species group. First flagellomere with distinct lower apical corner. Fore tarsus with tip of tarsomere 3 and entire tarsomere 4 white. Cercus with spine­like process.

Description. Male. Body length 3.9 mm, wing length 3.9 mm.

Head dark metallic green with gray pollen; face distinctly narrower than first flagellomere. Hairs and bristles black; postocular bristles black, with postero­ventral hairs pale. Ocellar tubercle weakly raised, with 2 strong oc and 2 very short posterior hairs. Antenna ( Fig. 1 ) black; first flagellomere 0.7 times as long as wide, with distinct lower apical corner; arista dark brown, long, with rather short basal segment. Proboscis black with black hairs; palpus black with black hairs and 1 black apical bristle.

Thorax dark metallic green with gray pollen. Hairs and bristles black; 5 strong dc, 7 irregularly paired acr; 2 npl, 1 sa, 1 pa; scutellum with one pair of strong bristles. Propleuron with 1 black bristle on lower portion. Legs [hind tarsomeres 4–5 broken off] brownish yellow; fore and mid coxae blackish, hind coxa brownish yellow; tarsi from tip of tarsomere 1 onward brown to dark brown, except fore tarsus with tip of tarsomere 3 and entire tarsomere 4 white. Hairs and bristles black; fore coxa with 6–7 bristles, hind coxa with 1 outer bristle. Fore tibia with 2 apical bristles; mid tibia with 2 ad, 2 pd, 1 very short pv and 2 apical bristles; hind tibia with 1 ad, 3 pd and 3 apical bristles. Hind tarsomere 1 with 1 v at base. Relative lengths of tibia and 5 tarsomeres LI 1.4: 1.0: 0.8: 0.4: 0.3: 0.2; LII 1.9: 1.15: 0.7: 0.5: 0.35: 0.15; LIII 2.2: 0.45: 1.05: 0.65:?:?. Wing grayish; veins dark brown, costal section basal to h slightly thickened, R4+5 and M weakly convergent distally; CuAx ratio 0.57. Calypters dark brown, with black hairs. Halter yellow with brownish knob.

Abdomen dark brown with gray pollen. Hairs and bristles black. Male genitalia ( Figs. 2–3 ): surstylus with nearly straight dorsal lobe narrow apically and basally narrow ventral lobe bearing a lateral process in middle; cercus with a spine­like process at middle and a group of 5 bristles on an indistinct tubercle; postgonite invisible in lateral view; hypandrium furcate apically, with some marginal denticles; aedeagus thick, concave near middle and bearing several hairs near base.

Female. Unknown.

Type Material. Holotype male, CHINA: Guangxi: Tianlin, Langping, Linaoshan (1300m), 14. VIII. 2002, D. Yang.

Etymology. The specific name refers to the type locality Guangxi.

Comments. This new species is very similar to N. pallipilosa Yang and Saigusa from Yunnan, but may be separated from the latter by the first flagellomere having an acute lower apical corner, while in N. pallipilosa , the first flagellomere has an obtuse lower apical corner ( Yang and Saigusa, 2001b).

Distribution. Guangxi.

Figures

FIGURES 1 – 3. Nepalomyia guangxiensis sp. nov. (male). 1. Antenna; 2. genitalia, left lateral view; 3. hypandrium, ventral view. Ce—Cercus, Sdl—Surstylar dorsal lobe, Svl—Surstylar ventral lobe, Aed—Aedeagus, Hyp—Hypandrium, El—Epandrial lobe.