Nepalomyia xui, 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 : 38-40

Nepalomyia xui sp. nov.

( Figs. 1−4 )

Diagnosis. Antennal segment three 1.2 times longer than wide, with distinct lower apical corner ( Fig. 2 ). Veins R2+3 and R4+5 with swollen bases ( Fig. 1 ). Halter brownish. Hind tibia with one ad, 7–8 pd, and row of pv bristles.

Description. MALE. Body length 2.9–3.0 mm, wing length 2.6–2.7 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 weak, with two strong oc and two short posterior hairs. Antenna blackish; the third segment elongated ( Fig. 2 ), 1.2 times longer than wide, with distinct posteroapical projection; arista blackish, long, with short blackish hairs. Proboscis blackish with black hairs; palpus black with black hairs and 1 black apical bristle.

Thorax dark metallic green with gray pollen; pleuron dark brown, with pale gray pollen. Hairs and bristles on 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 short posterior npl, one short anterior and one long posterior sa, one long psa; scutellum with two pairs of bristles. Propleuron with 2–3 short pale hairs on upper portion and one black bristle on lower portion.

Legs brown; coxae dark brown with yellow apices, but mid coxa with brown base; fore and mid tarsi from apex of tarsomere one onward brown to dark brown, hind tarsus black brown. Hairs and bristles on legs black; fore coxa with six apical bristles, mid coxa with four anterior bristles, hind coxa with one outer lateral bristle. Fore femur with 1–2 short apical v, 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, 7–8 pd, and one row of pv, apically with three bristles. Hind tarsomere 1 with a basal spur curved upward, and two strong v at base. Relative lengths of tibia and tarsomeres LI 4.5: 2.0: 1.2: 1.0: 0.6: 0.6; LII 6.5: 3.0: 2.0: 1.2: 0.7: 0.5; LIII 6.5: 1.5: 2.5: 1.4: 0.9: 0.5.

Wing ( Fig. 1 ) hyaline, with pale gray, veins dark brown, R2+3 and R4+5 with swollen bases, R4+5 and M1 parallel apically; CuAx ratio 0.5. Calypter blackish, with black hairs. Halter brownish.

Abdomen dark metallic green with gray-brown pollen. Hairs and bristles on abdomen black. Genitalia ( Figs. 3–4 ): epandrium with long thick lateral tubercle bearing one long apical and one basal bristle; surstylus with long narrow dorsal lobe bearing apical portion swollen, wide middle lobe, and slender and bifurcated ventral lobe; cercus with sparse long hairs at base, with one modified long bristle at middle, and with swollen apex; hypandrium narrow, symmetrical, rather short with a deep apical incision; aedeagus long, curved at middle, apically trifurcated, with two lateral processes with swollen apex.

FEMALE. Unknown.

Type material. Holotype male, Guangdong: Ruyuan county, 0 9. V. 2004, Patrick Grootaert. Paratype one male, Hainan: Changjiang county, Bawangling, Donger station 1000 m, 21. X. 2007, Ding Yang.

Distribution. Guangdong, Hainan.

Etymology. The specific epithet derives from the kind entomologist Prof. Zaifu Xu (Guangdong).

Comments. The species is similar to Nepalomyia siveci (Wang et Yang) in having the third antennal segment subtriangular, distinctly longer than wide, but it may be separated from the latter by having the hind tibia basally without the posterior hairs and aedeagus geniculate. In N. siveci , the hind tibia basally has the very long soft posterior hairs, and the aedeagus is not geniculate ( Wang and Yang, 2004).

Figures

FIGURES 1 – 4. Nepalomyia xui sp. nov. Male. 1. Basal portion of wing; 2. 3 rd antennal segment and arista, lateral view; 3. genitalia, lateral view; 4. hypandrium and apex of aedeagus, ventral view. A—aedeagus; C—cercus; H—hypandrium; LT—lateral tubercle; SDL—surstylus dorsal lobe; SML—surstylus middle lobe; SVL — surstylus ventral lobe; V—ventral.