Hemipenthes beijingensis, Yao, Gang, Yang, Ding & Evenhuis, Neal L., 2008

Yao, Gang, Yang, Ding & Evenhuis, Neal L., 2008, Species of Hemipenthes Loew, 1869 from Palaearctic China (Diptera: Bombyliidae), Zootaxa 1870, pp. 1-23 : 6

Hemipenthes beijingensis sp. nov.

( Figs. 2 , 17–22 )

Diagnosis. Hyaline part of cell r1 crescent-shaped; hyaline apical part of cell cu-a1 small, subtriangular. Epiphallus narrowed at middle, with a half unclear line apically; distiphallus subquadrate in dorsal view, long and slightly narrowing apically in lateral view.

Description. Male. Body length 6–13 mm, wing length 7–14 mm.

Head black; ocellar tubercle dark brown. Hairs on head black or yellow; frons with erect black hairs and sparse yellow recumbent hairs; face with dense black and yellow hairs; occiput with sparse black and yellow hairs and a row of erect blackish hairs on the edge; ocellar tubercle with six black hairs. Antenna brown; scape long cylindrical, two times longer than wide, with rows of long, black hairs on both sides; pedicel nearly as long as wide, with sparse black hairs; first flagellomere onion-shaped, brownish, bare. Antennal ratio: 5:2:10. Proboscis brown with yellow and black hairs; palpus yellowish brown with black and yellow hairs.

Thorax black with brown pollen. Hairs on thorax mostly yellow, bristles on thorax black or yellow; hairs on postpronotal lobe yellow, mesonotum with row of long yellow hairs along anterior margin and three long black lateral bristles near base of wing; laterotergite with a pile of yellowish hairs; postalar callus with three yellow bristles. Scutellum with yellow or black sparse long hairs. Legs black except tibiae yellow. Hairs on legs mostly black, bristles black. Femora with long black hairs; tibiae with short black hairs; tarsi with some short black hairs. Mid femur with three av apically; hind femur with three av apically. Mid tibia with nine ad, nine pd, six av and six pv; hind tibia with 12 ad, 12 pd, nine av and nine pv. Femora and tibiae with yellow scales. Wing ( Fig. 2 ) half infuscate; hyaline part including entire cells r4, most part of cells r2+3, r5, m1, m2, dm, and cu-a1, and little part of cells cup, a, and r1; hyaline part of cell r1 crescent-shaped; hyaline apical part of cell a very small, subtriangular. Halteres black; knob pale.

Abdomen black with brown pollen. Hairs on abdomen yellowish and black; dorsum with long dense yellowish hairs laterally except tergites 1, 4, and 7; dorsum with black recumbent hairs, tergite 4 with a small mid-posterior area bare; tergites 9–10 with yellowish hairs. Sternites with yellow recumbent hairs and erect black hairs.

Male genitalia ( Figs. 17–22 ). Epandrium subquadrate, twice longer than high, and with small lateral extension at base in lateral view, epandrium twice wider than high in posterior view; gonocoxa more or less narrowing posteriorly, with a rather narrow middle incision apically and apicolateral lobes somewhat acute apically in ventral view; gonostylus with a basal process, its acute tip strongly curved in lateral view; epiphallus nearly semicircular apically, distinctly narrowed at middle, with a line half unclear apically; distiphallus curved in dorsal view, but long, slightly narrowing apically in lateral view.

Female. Unknown.

Type material. Holotype male, CHINA: Beijing, Xiaolongmen, 14. VIII. 2007, Gang Yao. Paratypes 4 males, the same as holotype; 2 males, CHINA: Hebei, Yangjiaping, 12. VIII. 2007, Gang Yao; 1 male, CHINA: Hebei, Yangjiaping, 11. VIII. 2007, Gang Yao; 1 male, CHINA: Hebei, Wulingshan, 24. VIII. 2007, Kuiyan Zhang.

Distribution. China (Beijing, Hebei).

Etymology. The species is named after the type locality Beijing.

Remarks. The new species is similar to H. mesasiatica (Zaitzev) , but it can be separated from the latter by the hyaline part of cell cu-a1 smaller, the epiphallus distinctly narrowing at middle, and the distiphallus subquadrate in dorsal view. In H. mesasiatica , the hyaline apical part of cell cu-a1 is rather large, more than half of the infuscate part; the epiphallus is slightly narrowing at middle, and the distiphallus is subtriangular in dorsal view ( Zaitzev, 1962).

Figures

FIGURES 1 – 10. Hemipenthes wings. 1. Hemipenthes apiculata sp. nov.; 2. Hemipenthes beijingensis sp. nov.; 3. Hemipenthes cheni sp. nov.; 4. Hemipenthes hamifera Loew; 5. Hemipenthes hebeiensis sp. nov.; 6. Hemipenthes maura Linnaeus; 7. Hemipenthes neimengguensis sp. nov.; 8. Hemipenthes ningxiaensis sp. nov.; 9. Hemipenthes nitidofasciata Portschinsky; 10. Hemipenthes velutina Wiedemann.

FIGURES 17 – 22. Hemipenthes beijingensis sp. nov. male genitalia. 17. phallus, lateral view; 18. phallus, dorsal view; 19. epandrium and cercus, posterior view; 20. gonocoxa and gonostylus, lateral view; 21. gonocoxa and gonostylus, ventral view; 22. epandrium and cercus, lateral view.