Chelifera tibetensis, 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 : 190-191

Chelifera tibetensis sp. nov.

Figs 4–6

Diagnosis. Antenna entirely dark yellow. Wing entirely hyaline, without pterostigma. Male cercus much wider than epandrium, with wide apical margin nearly truncate in lateral view. Epandrium distinctly longer than cercus, apically long and finger-like. Postgonite long and band-like, with curved apex.

Description. Male. Body length 3.3 mm, wing length 4.1 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 (2 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 dark brownish with pale gray pollinosity, except postalar calli dark yellow. 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 tarsomeres 3–5 brown. Setulae and setae on legs blackish. Fore femur greatly thickened, 2.7 times as thick as mid femur, with 2 rows of black ventral denticles and 2 rows of strong outer ventral setae brownish yellow (6 av, 5 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, without pterostigma; veins brownish yellow. Squama yellow with pale yellow setulae. Halter yellow.

Abdomen dark brown with pale gray pollinosity, with hypopygium dark yellow except cerci with dark brown margin. Setulae on abdomen pale yellow.

Male genitalia ( Figs 4–6 ): Cercus large and wide, much wider than epandrium at widest point in lateral view, with wide apical margin nearly truncate in lateral view. Epandrium distinctly longer than cercus; basally rather wide, narrowed toward tip, apically long finger-like. Hypandrium slightly wider than epandrium, long subconical in lateral view; hypandrial process short finger-like. Postgonite long band-like with curved apex. Phallus strongly curved upward, with broad apex distinctly curved and bearing group of spines.

Female. Unknown.

Type material. HOLOTYPE ♂, CHINA, Tibet, Bomi (N29°51′ 42.57″ E95°46′ 1.59″), Galonglashan, 1500 m, 13.VII.2013, X. Liu ( CAU).

Distribution. China (Tibet).

Etymology. This specific name refers to the type locality, Tibet.

Figures

FIGURES 4 – 6. Chelifera tibetensis sp. nov. (male). 4. Genitalia, lateral view; 5. cerci, dorsal view; 6. hypandrium and phallus, lateral view. Scale bar = 0.2 mm.