Heleodromia (Heleodromia) basiflava, Wang, Junchao, Wang, Mengqing & Yang, Ding, 2013

Wang, Junchao, Wang, Mengqing & Yang, Ding, 2013, Heleodromia Haliday newly found in Tibet with description of one new species (Diptera: Empidoidea: Trichopezinae), Zootaxa 3746 (3), pp. 489-494 : 491-493

Heleodromia (Heleodromia) basiflava sp. nov.

( Figs 3–4 )

Diagnosis. Antenna blackish except scape and pedicel dark brownish yellow. Legs mostly dark brownish yellow. All coxae brown. All femora with distinct av basally; fore femur with 4 av (basalmost av longest). Tergite 8 with distinct mid-posterior process finger-like in lateral view. Epandrial lobe basally wide with 2 thick bristles, apically thin finger-like with 1 thick bristle at tip; surstylus rather small, apically nearly acute.

Description. Male. Body length 2.2–2.3 mm, wing length 2.4–2.6 mm.

Head black with pale gray pollen. Eyes very narrowly separated on face, brown. Setae and setulae on head black except posteroventral surface with pale setulae; ocellar tubercle distinct with pair of long oc. Antenna blackish except scape and pedicel brownish yellow; first flagellomere long conical, 1.6X longer than wide; arista very long, 2X length of flagellomere; pedicel with circle of subapical hairs, first flagellomere and arista very short micropubescent. Proboscis long, 0.8X as long as head height, blackish with blackish setulae. Palpus blackish with blackish setulae and 4 long blackish apical setae.

Thorax black with pale gray pollinosity. Setae and setulae on thorax black; pronotum with 1 seta laterally; 1 h, 1 npl, 2 short acr, 4 dc, 1 psa; scutellum with 2 setae. Legs dark brownish yellow except all coxae brown, fore tibia and tarsus brown, mid and hind tarsi from tip of tarsomere 1 brown onward. Setulae and setae on legs black except those on coxae blackish; all femora with distinct av setae, fore femur basally with row of 4 av setae (basalmost seta longest, nearly as long as femur thickness). Fore femur 1.2X as thick as mid femur, mid and hind femora subequal in thickness. Wing hyaline, slightly tinged grayish; veins dark brown. Squama dark yellow, bordered with pale setulae. Halter dark brown.

Abdomen blackish with pale gray pollinosity; hypopygium dark brownish yellow. Setulae and setae on abdomen blackish to black. Male genitalia ( Figs 3–4 ): tergite and sternite 8 rather small; tergite 8 with distinct midposterior process finger-like in lateral view. Epandrium and hypandrium much elongated and rather large; epandrium distinctly shorter than hypandrium in lateral view; epandrial lobe basally wide with 2 thick bristles, apically thin finger-like with 1 thick bristle at tip; surstylus rather small, apically nearly acute with very short denticle.

Female. Unknown.

Type material. HOLOTYPE ♂, CHINA, Tibet, Linzhi, Sejilashankouxi (N29°33′65′′, E94°33′81′′), 3789 m, 2012. VIII.15–18 (Malaise trap, Zeqing Niu, Huanxi Cao & Qingtao Wu, leg.). PARATYPE: 1 ♂, CHINA, Tibet, Linzhi (N29°38′ 18″ E94°21′ 46″), 2012. IX.2–12 (Malaise trap, Zeqing Niu, Huanxi Cao & Qingtao Wu, leg.).

Distribution. China (Tibet).

Etymology. The specific name refers to the antenna dark brownish yellow basally.

Remarks. This new species is similar to Heleodromia (Heleodromia) ausobskyi Wagner , but can be easily separated from it by the following features: epandrial lobe relatively large, basally wide with long finger-like apex, surstylus apically nearly straight, not hook-like; in H. (H.) ausobskyi , epandrial lobe very small, short finger-like, surstylus apically strongly curved forwards, hook-like (Wagner 1983).

Figures

FIGURES 3 – 4. Heleodromia (Heleodromia) basiflava sp. nov. (male). 3. Tergite 8, dorsal view. 4. Genitalia, lateral view. Abbreviations: epl = epandrial lobe; epn = epandrium; hp = hypoproct process; hyp = hypandrium; ph = phallus; sur = surstylus; s 8 = sternite 8; t 8 = tergite 8. Scale bar 0.1 mm.