There are 2 genera and 5 species in Loess Plateau,eastern Long Mountain,2 species of palaearctic region,3 species are widespread species,the composition is simple and species are the least in this area.

• 陇东黄土高原虻科2属5种,其中古北界成分2种,广布种成分3种,该区虻种组成简单,也是虻种数最少的分布区;