The Immature Stages of the Canadian Species of Pero Herrich-Schaeffer (Lepidoptera: Geometridae)

Abstract

The immature stages of five Canadian species of Pero Herrich-Schaeffer are described. These species arc P. bebrensarius Packard, P. bonestarim Walker, P. mizon Ritidge, P. morrisonaius Henry Edwards, and P. occidentalis pnckardi Cassino and Swett. Three colour patterns have been noted in the larvae of P. mizon and P. morrisovarius but only nne in each of P. behreniarius, P. bonestarius and P. occidtmtalis packardi. Brief accounts of the life histories and habits of the species are presented together with a key to the mature larvae.