Hybos qinlingensis, Li, Zhu, Wang, Ning & Yang, Ding, 2014

Li, Zhu, Wang, Ning & Yang, Ding, 2014, New species of Hybos Meigen from Northwest China (Diptera: Empidoidea, Hybotinae), Zootaxa 3786 (2), pp. 166-180 : 175

14. Hybos qinlingensis sp. nov.

( Figs 13–16 )

Diagnosis. Wing hyaline, R4+5 and M1 weakly divergent apically. Legs nearly entirely black except knees brownish. Hind femur weakly thickened, with two rows of sparse v (9–10 av; 2–3 pv located only at base). Hind tibia with 1 ad at middle. Left and right surstyli rather wide with wide apical incision. Hypandrium apically wide with irregular incision.

Description. Male. Body length 3.3–3.4 mm, wing length 2.9–3.15 mm.

Head black with pale gray pollinosity. Eyes reddish yellow with distinctly enlarged upper facets. Setulae and setae on head black except posteroventral surface with mostly dark yellow setulae; ocellar tubercle indistinct, with 2 short oc. Antenna black; scape without setulae, pedicel with circlet of black subapical setulae; first flagellomere distinctly longer than wide, without dorsal setula; arista blackish, very short pubescent, apical 1/4 or so thin and bare. Proboscis shorter than head, blackish. Palpus blackish, with 1 setula at tip.

Thorax black with pale gray pollinosity. Setulae on thorax pale yellow, setae black; ppn absent, 2 npl (posterior npl long), irregularly quadriseriate acr, uniseriate dc nearly as long as acr, 1 long prsc, 1 psa shorter than prsc; scutellum with 6 short marginal setulae and 2 long sc. Legs nearly entirely black except knees brownish. Setulae on legs dark yellow, setae black, but setulae and setae on coxae entirely dark yellow, setulae on tibiae partly and those on tarsi entirely dark brown or blackish. Fore femur 1.1 times and hind femur 1.7 times as wide as mid femur. Hind femur weakly thickened, with two rows of sparse ventral setae (9–10 av; only 2–3 pv at base). Fore tibia apically with 1 long ad. Mid tibia with 1 very long ad and 1 very long av on median portion; apically with 4 setae (which of 1 av is very long). Hind tibia weakly thickened at tip, with 1 ad at middle; apically with 1 subapical ad, 1 pd and 1 av. Fore tarsomere 1 with 1 long pv at extreme base. Mid tarsomere 1 with 1 long pv at extreme base. Hind tarsomere 1 with short irregular ventral spines. Wing hyaline, stigma distinct, dark brown; veins brown, R4+5 and M1 weakly divergent apically. Squama yellow with pale yellow setulae. Halter yellow.

Abdomen nearly straight, subshiny black with pale gray pollinosity; hypopygium swollen. Setulae and setae on abdomen dark yellow except hypopygium with partly blackish setulae and setae.

Male genitalia ( Figs 13–16 ). Left epandrial lamella nearly as long as right epandrial lamella, with short weak finger-like process at inner margin near middle; left surstylus rather wide with wide apical incision. Right epandrial lamella with weakly convex inner margin near middle; right surstylus rather wide with wide apical incision. Hypandrium distinctly longer than wide, apically wide with irregular incision.

Female. Body length 3.8–3.9 mm, wing length 3.6–3.8 mm. Similar to male, but hind femur only with one row of 8–9 av. Female terminalia: Tergite 8 distinctly extended downwards, nearly quadrate, apically with weak incision. Tergite 10 indistinct. Cercus basally wide, apically nearly acute. Sternite 8 well developed, slightly longer than tergite 8, much longer than wide, apically nearly truncate.

Type material. HOLOTYPE ♂, CHINA, Shaanxi, Zhouzhi (N34°09′ 53.16″ E108°13′ 2.24″), Liaoxiancheng, 1808 m, 2013. VIII.12, X.K. Li. PARATYPES: 1 ♂, same data as holotype; 1 ♂ 4 ♀, CHINA, Shaanxi, Ningshan (N33°18′ 44.05″ E108°18′ 34.73″), Pingheliang, 2013. VIII.15, Y.Q. Xi.

Distribution. China (Shaanxi).

Etymology. The specific name refers to the type locality Qinling Moutain.

Remarks. This new species is somewhat similar to H. gaoae Yang & Yang from Guizhou, but can be easily separated from it by the following characters: setulae on thorax pale yellow; hind femur with two rows of sparse ventral spines; left and right surstyli with very wide incision. In H. gaoae the setulae on the thorax are black; the hind femur has three rows of ventral spines; and the left and right surstyli have a very narrow incision ( Yang & Yang 2004).

Figures

FIGURES 13 – 16. Hybos qinlingensis sp. nov. (male). 13. Genitalia, dorsal view; 14. right surstylus; 15. left surstylus; 16. hypandrium, ventral view. Scale bar = 0.1 mm.