The present sunmary of Gonia sens. lat. is made necessary because of a large number of undescribcd species recently segregated in the Canadian National Collection and by Dr. H. J. Reinhard. The group covered is the same as that summarized by Tothil (1924) and Morrison (1940), the latter work containing all records of species up until 1940 and with illustrations of the male genitalia of each species. It becomes only necessary then to present descriptions of new species and to fit all species into their proper restricted genera (in Townsend's sense): a key to all described North American species and illustrations of the new species are included.