a1 Department of Entomology, University of Manitoba, Winnipeg
A key is given for 37 species of Aphis L. in Manitoba. Three new species of Aphis are described, duckmountainensis, neomonardae, and whiteshellensis. Aphis monardae Oestlund is declared to be a synonym of A. gossypii Glover. Lectotype and paralectotypes are designated for A. rubicola Oestlund. Comments on taxonomy and biology are given for other species in the genus.
(Received February 11 1976)