林芝地区八一镇食蚜蝇科访花昆虫区系(双翅目)

Faunistic Study on Pollinators of Syrphidae (Diptera) in Bayi Town of linzhi

记述西藏林芝地区八一镇食蚜蝇科的访花昆虫2亚科46种,隶属于8族、28属,其中包括西藏新纪录22种。它的区系特点是:单纯的古北区(8种)、东洋区(7种)种类数量基本相当,古北+东洋区共有种丰富,所占比例最大(占30.43%),而且新北区、非洲区、澳洲区的种类也占有一定比例。

This paper records 46 species of 2 subfamilies of pollinators of Syrphidae in bayi town,linzhi region of Tibet,belonging to 8 families and 28 genera,Among which 22 species are newly recorded in Tibet Province.Their fauna features are characterized by equal number of species of Oriental region （8 species） and Palaearctic region （7 species）,and the largest percentage of their total species （accounting for 30.43% in total）,as well as a certain proportion of the species in Neoarctic region （13 species）,Africa region （8 species） and Australian region （4 species）.