Abstract:
Eight genera and 52 species of Cochylini are recorded and discussed. Ten species (Phalonidia ontariana, Ph. memoranda, Platphalonidia albertae, P. dangi, P. imitabitis, Aethes heleniana, Ae. mymara, Cochylis avita, C. dormitoria, C. bucera) are described as new. For each species a short diagnosis and illustrations of the genitalia, if the specimen from Canada, are provided. Two genera (Gynnidomorpha and Cochylidia) are new to the New World, and a few species new to Canada. There are six species Holarctic in distribution and one species common to Nearctic and Neotropical regions.