Abstract: Diuraphis Aizenberg including 13 species distributes mainly in Palaearctic and Neoarctic realms. Based on the abundance of species and the endemic species, it is proposed that Euroasia is the primary distribution center of the genus and North America comes secondary. The geographic distribution of Diuraphis in the world is mapped out and a key to these species is given based on morphological characteristics of adults of apterous viviparous female. Seven species identified from collections in the northwest and north regions of China, Diuraphis noxia, D. nociva, D. (Holcaphis) holci, D. (Holcaphis) agropyronophaga, D. (Holcaphis) frequens, D. (Holcaphis) bromicola and D. (Holcaphis) elymophila, are briefly diagnosed. They distribute mainly in Meng-Xin region (Xinjiang, Gansu, Qinghai, and Inner Mongolia) in northwestern China.

Key words: Diuraphis Aizenberg, key to species, geographic distribution, China