Abstract
While conducting research on the geographic origin of the wheat stem sawfly (Cephus cinctus Norton), we compared North American specimens to specimens of Eurasian Cephus spp., and discovered that specimens currently placed as C. hyalinatus Konow from Siberia are conspecific with the North American species. Given the pest status of the North American populations, which attack wheat and other cereals in the upper Great Plains (Weiss and Morrill 1992), this discovery has important implications for the management of the species. Discussion of these implications will be provided elsewhere (Ivie 1996).
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