The discovery by Mr. W. H. Edwards that Colias Hagenii is only a form of C. Eurytheme, as detailed in the Canadian Entomologist for September, while very interesting in itself, serves also to show that this genus is still in a very unsatisfactory state. That a form which so closely resembles Philodice that nine entomologists out of ten would take it for that species, should turn out to be a variety of Eurytheme, emphasizes Dr.Hagen's statement “that reliable differences between these two well known forms are still a want.” Mr. Edwards has also comet to the conclusion that Hagenii is the same as teh form previously named C. Eriphyle by him, as detailed in the November number of the Canadian Entomologist. A glance at the history of this form will be found interesting.