Chelifera liuae, Wang, Xiwei, Yan, Shanchun & Yang, Ding, 2014

Wang, Xiwei, Yan, Shanchun & Yang, Ding, 2014, Two new species of Chelifera Macquart from China (Diptera: Empididae), Zootaxa 3795 (2), pp. 187-192 : 188-189

Chelifera liuae sp. nov.

Figs 1–3

Diagnosis. Thorax yellow except dorsum mainly black. Antenna entirely dark yellow. Pterostigma short and wide, filling apex of cell r1. Male cercus apically bifurcated into small acute dorsal process and large obtuse ventral process. Epandrium subtriangular apically. Postgonite long thin with two apical hooks.

Description. Male. Body length 4.2–4.6 mm, wing length 4.2–4.3 mm.

Head black with pale gray pollinosity. Setulae on head pale yellow, setae brownish yellow; postocular setae very short and hair-like; 1 long and strong vt; ocellar tubercle weak with 2 long oc and 2 very short posterior setulae. Antenna entirely dark yellow; pedicel with circlet of pale yellow apical setulae; first flagellomere long and conical (1.9 times longer than wide), minutely pubescent; arista spine-like, about 0.33 as long as first flagellomere, bare. Proboscis dark yellow with blackish setulae; palpus dark yellow with short blackish setulae.

Thorax yellow with pale gray pollinosity, except pronotum black with yellow lateral portion; mesoscutum black with yellow lateral portion, black lateral spot just anterior to wing base and posterior margin brownish yellow; scutellum and postnotum black. Setulae on thorax pale yellow, setae brownish yellow; 1 long sa and psa subequal in length; scutellum with 3 pairs of sc (only 2 apical sc long). Legs yellow except fore tarsomeres 4–5, entire mid tarsus, apex of hind tarsomere 3 and hind tarsomeres 4–5 brown. Setulae and setae on legs blackish. Fore femur greatly thickened, 2.4–2.5 times as wide as mid femur, with 2 rows of black ventral denticles and 2 rows of strong outer ventral setae brownish yellow (6–7 av, 5–6 pv, with 1 basalmost pv longest, nearly as long as thickness of fore femur); fore tibia distinctly shorter than fore femur (0.7 times as long as fore femur), with blackish ventral ridge and 1 black strong apicoventral seta. Fore and hind tibiae each with short dense brown ventral setae on apical margin arranged in comb, mid tibia without additional ventral denticles and setae. Wing hyaline, dark brown pterostigma short wide and filling apex of cell r1; veins brownish to brown. Squama yellow with pale yellow setulae. Halter yellow.

Abdomen dark yellow with pale gray pollinosity, except tergites 1–7 dark brown and hypopygium black. Setulae on abdomen pale yellow.

Male genitalia ( Figs 1–3 ): Cercus large and wide, wider than epandrium at widest point in lateral view, apically furcated into small acute dorsal process and large obtuse ventral process. Epandrium slightly shorter than cercus; basally rather narrow, medially wide, apically somewhat narrowed and subtriangular. Hypandrium nearly as wide as epandrium, nearly quadrate in lateral view; hypandrial process short finger-like. Postgonite long and thin with two apical hooks. Phallus strongly curved upwards, with broad apex bearing group of spines.

Female. Unknown.

Type material. HOLOTYPE ♂, CHINA, Sichuan, Xiaojin (N31°0′ 4.67″ E102°21′ 45.41″), Balangshan, 3281 m, 9.VIII.2013, X. Liu ( CAU). PARATYPES: 2 ♂, same data as holotype ( CAU).

Distribution. China (Sichuan).

Etymology. This specific name refers to collector of the type specimens, Dr. Xiaoyan Liu.

Figures

FIGURES 1 – 3. Chelifera liuae sp. nov. (male). 1. Genitalia, lateral view; 2. cerci, dorsal view; 3. hypandrium and phallus, lateral view. Abbreviations: cer = cercus; eja = ejaculatory apodeme; epn = epandrium; hyp = hypandrium; hypp = hypandrial process; ph = phallus; pog = postgonite. Scale bar = 0.2 mm.