Villa aspros

Yao, Gang, Yang, Ding & Evenhuis, Neal L., 2009, Four new species and a new record of Villa Lioy, 1864 from China (Diptera: Bombyliidae), Zootaxa 2055, pp. 49-60 : 53-54

Villa aspros s p. nov.

( Figs. 2 , 12–17 )

Diagnosis. Tergites 2 and 4 with white recumbent scales anteriorly and tergite 3 with white recumbent scales antero-laterally, tergites 5–6 with white recumbent scales posteriorly. Gonocoxa distinctly narrowing apically in ventral view, with numerous black bristle-like hairs apically; gonostylus with an acute tip and narrowing from base to tip in lateral view; epiphallus subquadrate, narrowing from base to tip, with an irregular tip in dorsal view.

Description. Male. Body length 13 mm, wing length 12 mm.

Head black with grey pollen; ocellar tubercle reddish brown. Hairs on head black and white; frons with dense black erect hairs and sparse yellow erect scale-like hairs, face with dense black erect hairs; occiput with sparse short black erect hairs and white scales close to eyes, a row of yellow erect hairs on edge. Antenna black; scape short and thick, slightly longer than wide, with dense black hairs; pedicel nearly as long as wide, almost bare; first flagellomere cone-shaped, bare. Antennal ratio: 3:1:6. Proboscis dark brown with brown hairs; palpus dark with black hairs.

Thorax black with grey pollen. Hairs on thorax mostly yellow, bristles yellow and black; postpronotal lobe with long yellow hairs, mesonotum with row of long yellow hairs at anterior margin and three long yellow lateral bristles near base of wing, postalar callus with four yellow bristles; thorax with black scales on back. Scutellum with scales-like yellow hairs on posterior edge and black scales on back. Legs dark brown with black scales. Hairs on legs mostly black, bristles black. Femora with long black hairs; tibiae and tarsi dense short black hairs. Mid femur with four av apically; hind femur with six av apically. Mid tibia with eight ad, nine pd, seven av and 11 pv; hind tibia with nine av, and dense bristle-like hairs all round. Wing ( Fig. 2 ) hyaline entirely, with metalline reflecting. Base of vein C with brush-like long black hairs, tegula almost bare. Wing with basicosta strong; vein r-m nearly 2/5 length of discal cell apically. Halteres brown with tip pale.

Abdomen black. Hairs on abdomen black and white; dorsum with dense black recumbent scales except tergites 2 and 4 with white recumbent scales anteriorly and tergite 3 with white recumbent scales anterolaterally, tergites 5–6 with white recumbent scales posteriorly. Sternites with sparse long white erect hairs and dense black recumbent scales except sternite 4 with dense white recumbent scales.

Male genitalia ( Figs. 12–17 ). Epandrium subquadrate, nearly twice longer than high, with dense long black bristles apically, cercus well exposed in lateral view, epandrium about as long as wide, slightly narrowed from base to tip in dorsal view; gonocoxa with numerous black bristle-like hairs apically, distinctly narrowing apically in ventral view; gonostylus subquadrate, its tip acute and narrowed from base to tip in lateral view; epiphallus subquadrate, narrowing from base to tip, with an irregular tip in dorsal view, distiphallus rather narrow, long and curved apically in lateral view.

Female. Body length 14 mm, wing length 12 mm. Similar to male, but face with long white hairs.

Type material. Holotype male, CHINA: Henan, Jiyuan Wangwushan (N 112°10’ E 35°16’), 27. VII. 2007, Juncao Wang. Paratypes 1 male, CHINA: Beijing, Mentougou Longmenjian (N 114°40’ E 38°47’), 15. VIII. 2007, Gang Yao; 1 female, CHINA: Henan, Jiyuan Wangwushan (N 112°10’ E 35°16’), 28. VII. 2007, Juncao Wang.

Distribution. China (Beijing, Henan).

Etymology. The species epithet derives from the Latin “ aspros ” means “white diaper”; referring to white scales on the abdomen.

Remarks. The new species is similar to V. panisca Rossi , but it can be separated from the latter by tergites 2 and 4 with white recumbent scales anteriorly, tergite 3 with white recumbent scales antero-laterally, tergites 5–6 with white recumbent scales posteriorly; sternite 4 with the dense white recumbent scales. In V. panisca , tergites 3 and 4 have yellow hairs laterally, and tergites 5–6 have black hair laterally; the sternites have the black erect hairs and yellowish recumbent hairs.

Figures

FIGURES 1 – 5. Villa wings. 1. Villa aquila sp. nov.; 2. Villa aspros sp. nov.; 3. Villa cingulata Meigen; 4. Villa flavidus sp. nov.; 5. Villa obtusus sp. nov..

FIGURES 12 – 17. Villa aspros sp. nov. male genitalia. 12. epandrium and cercus, dorsal view; 13. epandrium and cercus, lateral view; 14. gonocoxa and gonostylus, lateral view; 15. phallus, dorsal view; 16. phallus, lateral view; 17. gonocoxa and gonostylus, ventral view.