陕西秦岭太白山北坡食蚜蝇科昆虫区系调查

Faunal study on syrphids of the north slope of Taibai,Qinling Mountains of Shaanxi

鉴定出秦岭太白山北坡食蚜蝇科昆虫2亚科,10族,35属,61种,包括中国新记录种3种:亮黄斑食蚜蝇Xanthogramma laetum(Fabricius)、无饰缩颜蚜蝇Pipiza inornataMatsumura和阿尔泰颜突蚜蝇Portevinia altaica(Stackelberg),陕西省新记录种16种。太白山北坡食蚜蝇科昆虫的区系成分以古北、东洋区共有种为主体,古北区成分略占优,东洋区成分占有一定比例;从属的分布类型看,多区属比例高达57.14%,单区属均为古北区成分,所占比例最低。太白山北坡食蚜蝇科昆虫区系具有明显的过渡性,混杂性和复杂性。

In the paper, 61 species of syrphids from the north slope of Taibai, Qinling Mountains of Shaanxi Province, were recorded, which belong to 35 genera, 10 triesi, 2 subfamilies of Syrphidae. Among them 16 species are newly recorded to Shaanxi Province, 3 species, Xanthogramma laetum （Fabricius）, Pipiza inornata Matsumura, 1916 and Portevinia altaica （Stackelberg）, newly recorded to China. In the fauna of Syrphidae of the area, common speices of Palaerctic and Oriental regions were predominant ancl elements of Palaeretic species slightly more abundant than that of Oriental species. According to the distributing types, the mutli-zoogeographical genera are predominant （55.74%）. The proportion of single-zoogeographical genera, all the elements of the Palaercfic, is the lowest. The results showed that the fauna of Syrphidae of the north slope of Taibai are transitional, intermixed and complex.