Nepalomyia jinshanensis, 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 : 44-45

Nepalomyia jinshanensis sp. nov.

( Figs. 12−13 )

Diagnosis. Postocular bristles (including postero-ventral hairs) pale yellow, antennal segment three about as long as wide. Hind tibia with two ad, five pd, and 5–6 pv. Cercus subtriangular with large basal tubercle and with spine-like bristles at middle and apex ( Fig. 13 ).

Description. MALE. Body length 1.6–1.7 mm, wing length 1.6–1.7 mm.

Head dark metallic green with gray-brown pollen; face with pale gray pollen. Hairs and bristles of head black; postocular bristles (including postero-ventral hairs) pale yellow. Ocellar tubercle weakly raised, with two strong oc and two short posterior hairs. Antenna black; third antennal segment about as long as wide ( Fig. 12 ), apically with a weak lower corner; arista black, long, with short blackish hairs. Proboscis brown with black hairs; palpus black with black hairs and 1 black apical bristle.

Thorax dark metallic green with gray pollen; pleuron brown. 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 long 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, outer pair weak and 1/4 length of inner pair. Propleuron with one blackish hair on upper portion, and two blackish hairs and one black bristle on lower portion.

Legs brownish; all coxae with yellow apex; all tibiae yellow; tarsi brownish-yellow except tarsomere one yellow and tarsomere five dark brown. Hairs and bristles on legs black; fore coxa with six yellow apical bristles, mid coxa with one yellow anterior bristle, hind coxa with one outer bristle. Fore femur with row of 6– 8 v on basal portion, apically with one av and one pv; mid femur with one preapical bristle and row of short v. Fore tibia apically with three short bristles; mid tibia with one ad near basal 1/4, apically with four bristles; hind tibia with two ad, five pd and 5–6 pv, apically with three bristles. Fore and hind tarsomere 1 each with 1– 2 v at base. Hind tarsomere 1 with a basal spur curved upward. Relative lengths of tibia and tarsomeres LI 2.6: 1.4: 0.8: 0.5: 0.4: 0.3; LII 3.9: 1.9: 1.1: 0.7: 0.4: 0.3; LIII 4.1: 1.2: 1.4: 0.8: 0.5: 0.4.

Wing hyaline, tinged with gray; veins dark brown, R4+5 and M1 parallel apically; CuAx ratio 0.33. Calypter dark brown with black hairs. Halter brownish.

Abdomen metallic green with gray-brown pollen; hairs and bristles black; venter with some yellow hairs. Genitalia ( Fig. 13 ): epandrium with two apical bristles and one basal bristle on lateral tubercle; surstylus on epandrium with slender dorsal lobe apically curved, middle lobe with somewhat swollen apical portion, ventral lobe narrow with short process and with apical hairs; cercus subtriangular with large basal tubercle and with spine-like bristles at middle and apex; hypandrium symmetrical in ventral view, with a deep V-shaped apical incision.

FEMALE. Unknown.

Type material. Holotype male, Beijing: Jinshan mountain, 0 3. VI. 1986, Yin Wang. Paratype one male, Sichuan: Qingchengshan mountain, 20. VIII. 1998, Ding Yang.

Distribution. Beijing, Sichuan.

Etymology. The specific epithet derives from the type locality Jinshan mountain (Beijing).

Comments. The species is similar to N. taiwanensis Wang et Yang in having the bifurcated hypandrium, but it may be separated by the cercus subtriangular with the large basal tubercle and spine-like bristles at middle and apex. In N. taiwanensis , the cercus long is band-like with two weak tubercles and hairs but without spine-like bristles ( Wang et Yang, 2004).

Figures

FIGURES 12 – 13. Nepalomyia jinshanensis sp. nov. Male. 12. 3 rd antennal segment and arista, lateral view; 13. genitalia, lateral view.