四川省西部丽蝇科三新种——(双翅目)

THREE NEW SPECIES OF CALLIPHORIDAE FROM WEST SICHUAN, CHINA (DIPTERA)

本文记述丽蝇科丽蝇族2新种,即皱叶陪丽蝇Bellardia rugiforceps和半月陪丽蝇Bellardissemilunaris,均采自四川荥经县;粉蝇族的1新种离叶瘦粉蝇Dexopollenia disemura,采自四川峨嵋山。模式标本均保存于中国科学院上海昆虫研究所。

Present paper deals with 2 new species of the genus Bellardia R.-D. and 1 new species of Dexopollenia Townsend all from western Sichuan, China. The type specimens are kept in Shanghai Institute of Entomology, Academia Sinica. 1. Bellardia rugiforceps Fan et Feng, sp. nov. (Figs. 1, 2) : Body length about 9 mm. Similar to Caucasian species B. kisha (Grunin, 1970), but ia 0+2, cerci in caudal view regularly tapered, of which the length of furca almost equal to that of suture. The aedeagus is also different. Holotype , Rongjing County, Sichuan, China, June 2, 1990. 2. Bellardia semilunaris Fan et Feng, sp. nov. (Figs. 3, 4) : Body length 7 mm. Related to Caucasian species B. rohdendorfi (Grunin, 1970) , but ia 0+3, cerci heart-shaped basally and very slender apically in caudal view, and sinuous in profile; surstylus leaf-like and somewhat of semilunar shape in profile ; vertical part of paraphallus long and straight, with a rectangular hook pointed forwards. Holotype, Rongjing County, Sichuan, China, June 2, 1990. 3. Dexopollenia disemura Fan et Deng, sp. nov. : Body length 5.5-6 mm. Present new species is similar to the species D. nigriscens Fan, 1992 from Xizang , China, however the former has 1 prescutal ac, dorsum of abdomen with pale brown dust remaining a black median vitta and a black marginal band, costal vein haired ventrally only on basal two sections, both of t2 and t3 without av, and prementum is 3.3 times as long as high. Holotype , Jinding, Mt. Emei, Sichuan, China, July 1984; paratypes 4 , same locality as the holotype.