关键词: 蝇科, 妙蝇属, 阳蝇属, 新种

Abstract: This paper describes three new species of the Muscidae from the western region of Sichuan province during the years 1979-1999,i.e. Myospila changzhenga sp.nov.,Helina shuensis sp.nov.,Helina platycephala sp.nov..The type specimens are kept in the Medical Entomological Specimen Building,Academy of Military Medical Sciences, Beijing,China. 1 Myospila changzhenga sp.nov.(Figs.1-8) This new species is similar to myospila fuscicoxa (Li,1980) from Sichuan Prov.,China, but differs from the latter in following features:♂: ia 0+1; frons about equal or smaller the width of 3rd antennal segment; gena about one-eighth to one-tenth times of the eye height; palpi dark-brown. ♀:frons about 0.3039 - 0.3137 times the head-width at middle part;6th sternite with a pair hairs on apical part;8th tergite not that formed in “L”,but that is a semicircle. Holotype ♂,Anshunchang,Shimian County on the side of Dadu River (890m,29°17′ N,102°16′ E),Sichuan,China,26 Oct.1987,collected by Feng Yan; paratypes 2♂♂, Yongfu,Baoxing County (1 500m,30°33′N,102°39′E),9 Aug.1984,by Yang Shibin; 1♂,Lionlu,Tianqian County (1 500m 29°28′N,102°21′E),24 Aug.1986,by Shiping;18♂♂,3♀♀,Mt.Laoban,Yaan City (800m,29°59′N,102°57′E),1980-1993 have been collected from varies dates,same collector as holotype. 2 Helina shuensis sp.nov.(Figs.9-12) ♂: This new species is similar to Helina pleuranthus Wu, Fang et Fan,1988 from shaanxi Prov.China, but differs from the latter in following features:frons about as width as deameter of front ocellus; hind tibia with 2 rows of pv setae; cerci in male inner-lateral procisses on apical-margin long and slender in posterior view; male surstyli post-carve on apical part in lateral view. ♀: Unknown. Holotype ♂,Mt.Erlang, Forest Farm (2 648m, 29°53′N,102°10′E),Sichuan Prov. 20 Aug.1984,collected by Feng Yan;paratype 1 ♂,same locality and data as holotype,by Yang Shibin. 3 Helina platycephala sp.nov. (Figs.13-17) ♂: This new species is similar to Helina fica Xue,1985 from Liaoning Prov.China, but differs from the latter in following features: Scutum at submiddle part with a pair vittae which not reach to scutellar sulcus; hind tibia with 2-3 row of pv setae; abdomen without formless spots; male surstyli as the semimoon in lateral view. ♀: Unknown. Holotype ♂,Mt. Erlang, Forest Farm (2 648m, 29°53′N,102°10′E) Sichuan Prov., 24 May 1984,collected by Feng Yan; paratype 1♂,Mt. Erlang Yakou (3 100m, 29°53′N,102°10 E), 21 Aug. 1984, by Yang Shibin.