A systematic reappraisal of the genus Diuraphis Aizenberg (Gemiptera: Aphididae)

Adult female apterae and alates of the genus Diuraphis Aizenberg are described and illustrated, and keys are provided for identification. Diuraphis elymophila G.x. Zhang is considered a new synonym of Diuraphis frequens (Walker) and Diuraphis muehlei (Borner) is considered a new synonym of Diuraphis noxia (Kurdjumov). A phylogenetic analysis suggests that while the clade that contains Diuraphis noxia + Diuraphis mexicana is monophyletic, the previously recognized subgenus Holcaphis is paraphvletic.