中国四川省有瓣蝇类三新种(双翅目:麻蝇总科,蝇总科)

THREE NEW SPECIES OF THE CALYPTRATAE (DIPTERA:SARCOPHAGOIDEA,MUSCOIDEA) FROM SICHUAN, CHINA

本文报道四川省有瓣蝇类３新种：小口瘦粉蝇Ｄｅｘｏｐｏｌｅｎｉａｐａｒｖｉｏｓｔｉａｓｐ．ｎｏｖ．（丽蝇科）；齿腹粪蝇Ｓｃａｔｈｏｐｈａｇａｏｄｏｎｔｏｓｔｅｒｎｉｔａｓｐ．ｎｏｖ．（粪蝇科）；橙须重毫蝇Ｄｉｃｈａｅｔｏｍｙｉａｐａｌｐｉａｕｒａｎｔｉａｃａｓｐ．ｎｏｖ．（蝇科）。

This paper describes three new species of the Calliphoridae, Scathophagidae and Muscidae of the Calyptratae from mountainous region of western Sichuan Province, named Dexopollenia parviostia sp. nov., Scathophaga odontosternita sp. nov. and Dichaetomyia palpiaurantiaca sp. nov. The type specimens are kept in the Medical Entomological Specimen Building, Institute of Microbioly and Epidemiology Academy of military Medical Sciences, Beijing, China. 1. Dexopollenia parviostia, sp. nov. (Figs.1～5) ♂: Body length 4.6 mm. This new species similar to the Dexopollenia disemura Fan et Deng, 1993, but differs from the latter in: The fore tibiae without long hairs on the ventral surface; width of frons at narrowest part about 2.33 times of the diameter of front ocellus; the posthumeral region with yellow hairs; the hypophallus long and expanded, its apical parts of ventral processes beyond the paraphallus markedly. ♀: Unknown. Holotype ♂, Hanyuan (Mt. Jaoding, 3550 m. 29°22′N, 102°53′E), Sichuan Prov., 9-Ⅶ-1988, collected by Feng Yan. 2. Scathophaga odontosternita, sp. nov. (Figs.6～8) ♂: Body length 7.5 mm. This new species similar to Scathophaga amplipennis (Portschinsky, 1887), but differs from the latter in :The antenna reddish brown on the basal part of the 3rd segment; the longest hairs on arista about 1.7 times of the width of 3rd antennal segment; the lateral lobe of 5th sternite with 2 rows of obtuse spines on two thirds of apical part of the inner margin; prescutal acrostichals shorter and in 2 irregular rows. ♀: Unknown. Holotype ♂, Yingjing (Paocaowan, 2460 m. 29°58′N, 102°50′E), Sichuan Prov., 1-Ⅵ-1990, collected by Feng Yan. Bionomics: The specimen of this new species was obtained on human faeces in the virgin forest on a foggy day, air temperature about 21°C. 3. Dichaetomyia palpiaurantiaca, sp. nov. (Figs.9～11) ♂: Body length 7.5 mm. The nwe species similar to the Dichaetomyia melanotela Emden, 1965 from Srilanka, but differs from the latter in having no prescutal intraalar; height of the jowls about twice the width of 3rd antennal segment; lower squama wholly yellowish; hind femur with a row of shorter and thick bristles on the apical half, but the basal half with a row of slender hairs on the anteroventral surface; eyes without markedly enlarged anterior inner facets. It similar to the Dichaetomyia setifemur Malloch, 1928 too, but in the present new species the r vein without yellowish cilia on posterior margin of dorsal surface, palpi yellowish white translucent. ♀: Unknown. Holotype ♂, Yaan (Mt. Zhougong, 1700 m. 29°58′N, 102°54′E), Sichuan Prov., 2-Ⅵ-1989, collected by Feng Yan.