Hemipenthes cheni, 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 : 8

Hemipenthes cheni sp. nov.

( Figs. 3 , 23–28 )

Diagnosis. Cell r2+3 without an apical spot; entire cell of r4 hyaline. Abdominal dorsum (except tergites 1 and 4) with long dense black hairs laterally; sternite 1 with long white hairs. Epiphallus narrowing near base, apically with a clear curve line, distiphallus subtriangular in dorsal view.

Description. Male. Body length 11 mm, wing length 12 mm.

Head black with gray pollen except occiput with brown pollen; ocellar tubercle reddish. Hairs on head black or yellow; frons with long black hairs; face with yellow and dense black hairs; occiput with sparse black hairs and a row of erect brown hairs on the edge; ocellar tubercle with four black hairs. Antenna brown; scape long cylindrical, three 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: 3:1:5. Proboscis dark brown with yellow hairs; palpus yellowish with long, blackish hairs.

Thorax black with gray pollen except scutellum with brown pollen. Hairs on thorax mostly yellow and white; bristles on thorax black and yellow; postpronotal lobe with long white hairs, 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 yellow hairs. Scutellum with sparse long black hairs. Legs brown except tarsi black. Hairs on legs yellow and black, bristles black. Femora with long black hairs; tibiae with bristle-like hairs and some short yellow hairs; tarsi with some short yellow hairs. Mid femur with two av apically; hind femur with two av apically. Mid tibia with seven ad, seven pd, six av and eight pv; hind tibia with 10 ad, nine pd, seven av and eight pv. Hind femur with yellow scales; mid and hind tibiae with yellow scales. Wing ( Fig. 3 ) half infuscate; hyaline part including entire cell r4, most part of cells r2+3, r5, dm, cu-a1, m1 and m2, and little part of cells cup, a, and r1; hyaline part of cell r1 nearly semicircular; hyaline apical part of cell a small, subtriangular. Halteres brown; knob pale.

Abdomen black with brown pollen. Hairs on abdomen white and black; dorsum with long dense black hairs laterally except tergites 1 and 4 with white hairs; dorsum with black recumbent hairs, tergites 2–6 with a small mid-posterior area bare; tergites 9–10 with black hairs. Sternites with yellow recumbent hairs and erect black hairs except sternite 1 with long white hairs.

Male genitalia ( Figs. 23–28 ). Epandrium subquadrate, nearly as long as wide, and with distinct lateral extension at base in lateral view, epandrium slightly higher than long in posterior view; gonocoxite with slightly narrow apical portion, with a V-shaped middle incision apically in dorsal view and apicolateral lobes somewhat acute apically in ventral view; gonostylus with a basal process, its acute tip strongly curved in lateral view; epiphallus narrowing near base, with a clear curve line apically, distiphallus subtriangular in dorsal view, distiphallus with an acute tip in lateral view.

Female. Body length 9 mm, wing length 9–11 mm. Similar to male, but cell r2+3 with a dark spot apically.

Type material. Holotype male, CHINA: Inner Mongolia, Bayannaoer, 14. VII. 1978, Heming Chen. Paratypes 2 females, CHINA: Inner Mongolia, Bayannaoer, 14. VII. 1978, Heming Chen.

Distribution. China (Inner Mongolia).

Etymology. The species is named after the name of collector Heming Chen.

Remarks. The new species is similar to H. tushetica (Zaitzev) , but it can be separated from the latter by the entire cell of r4 hyaline and cell r2+3 without infuscate spot apically in male; the epiphallus narrowing near base, and the distiphallus subtriangular in dorsal view. In H. tushetica , cell of r2+3 has a dark spot apically, cell of r4 has a infuscate spot basally; the epiphallus is not narrowing, and the distiphallus is subquadrate in dorsal view ( Zaitzev, 1966).

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 23 – 28. Hemipenthes cheni sp. nov. male genitalia. 23. gonocoxa and gonostylus, lateral view; 24. epandrium and cercus, lateral view; 25. epandrium and cercus, posterior view; 26. gonocoxa and gonostylus, ventral view; 27. phallus, dorsal view; 28. phallus, lateral view.