Nepalomyia hastata, Wang, Mengqing, Yang, Ding & Grootaert, Patrick, 2009

Wang, Mengqing, Yang, Ding & Grootaert, Patrick, 2009, New species of Nepalomyia from China (Diptera: Dolichopodidae), Zootaxa 2162, pp. 37-49 : 42-44

Nepalomyia hastata sp. nov.

( Figs. 8−11 )

Diagnosis. Postocular bristles (including posteroventral hairs) black. Antennal segment three 1.4 times longer than wide. Hypandrium symmetrical, bifurcated, and with two lateral processes hastate ( Figs. 10–11 ). Description. MALE. Body length 3.0 mm, wing length 2.3 mm.

Head dark metallic green with gray-brown pollen; face with pale gray pollen. Hairs and bristles of head black; postocular bristles (including posteroventral hairs) black. Ocellar tubercle weakly raised, with two strong oc and two short posterior hairs. Antenna black; the third antennal segment 1.4 times longer than wide ( Fig. 9 ), apically with a distinct lower corner; arista blackish, long, with short blackish hairs. Proboscis blackish with black hairs; palpus black with black hairs and one black apical bristle.

Thorax dark metallic green with gray pollen; pleuron brown except pteropleuron dark brown. Hairs and bristles of thorax black; five strong dc, 5–6 irregularly paired acr; humerus with one long bristle and one short hair; one long ph, one somewhat short ih, one short su, one long anterior and one somewhat short posterior npl, one somewhat short anterior and one long posterior sa, one long psa; scutellum with two pairs of bristles. Propleuron with 2–3 pale hairs on upper portion and one black bristle on lower portion.

Legs yellow (hind tarsomeres 2–5 missing); mid and hind coxae brownish, mid coxa with postero-upper corner blackish; mid and hind tibiae brownish; mid tarsus from segment two to apex of segment five from brownish to dark brown; Hind tarsomere 1 dark yellow. Hairs and bristles on legs black; fore coxa with 4–6 anterior bristles, mid coxa with 4–6 anterior bristles, hind coxa with one outer bristle at middle portion. Mid and hind femora each with one preapical bristle. Fore tibia apically with three short bristles; mid tibia with two ad and two pd, apically with four bristles; hind tibia with one ad, three pd and three v, apically with three bristles. Hind tarsomere 1 with two strong v at base and a basal spur curved upward. Relative lengths of tibia and tarsomeres LI 3.4: 2.2: 1.4: 1.1: 0.6: 0.5; LII 4.8: 2.9: 1.4: 1.3: 0.9: 0.5; LIII 6.0: 1.5:?:?:?:?.

Wing ( Fig. 8 ) hyaline, tinged with grayish; veins dark brown, R4+5 and M1 parallel apically; CuAx ratio 0.45. Calypter blackish with black hairs. Halter brownish.

Abdomen metallic green with gray-brown pollen except lateral margin brownish; hairs and bristles black.

Genitalia ( Figs. 10–11 ): epandrium with finger-like lateral tubercle bearing one long apical bristle and one short basal hair; surstylus on epandrium with dorsal lobe long and thick, apical portion swollen, both middle lobe and ventral lobe narrow with apical hairs; cercus without basal tubercle, but with short pale hairs; hypandrium symmetrical in ventral view, bifurcated, and with two lateral processes hastate ; aedeagus thick with apical portion somewhat swollen.

FEMALE. Unknown.

Type material. Holotype male, Guangdong: Huizhou, Xiangtoushan, 11. V. 2004, Patrick Grootaert.

Distribution. Guangdong.

Etymology. The specific epithet derives from the hastate-like lateral processes of the hypandrium ( Fig. 11 ).

Comments. The species is similar to N. furcata (Yang et Saigusa) in having the third antennal segment distinctly longer than wide, but it may be separated from the latter by the third antennal segment 1.2 times longer than wide. In N. furcata , the third antennal segment is 2.5 times longer than wide ( Yang and Saigusa, 2001a).

Figures

FIGURES 8 – 11. Nepalomyia hastata sp. nov. Male. 8. Wing; 9. 3 rd antennal segment and arista, lateral view; 10. genitalia, lateral view; 11. hypandrium, ventral view.