A key to Macrosiphum (Sitobion) spp. (Homoptera: Aphididae) on ferns in North America, with descriptions of four new species
Robinson, AG., 1980: A key to Macrosiphum (Sitobion) spp. (Homoptera: Aphididae) on ferns in North America, with descriptions of four new species. Canadian Entomologist, 1129: 955-961
A key is provided to the 9 species in the subgenus Sitobion of Macrosiphum (but in this Review Sitobion is regarded as a good genus) on ferns in North America, including 4 that are newly described.