The paper in the May number of The Canadian Entomologist on the above subject is very interesting, but does not, in my opinion, entirely conclude the subject. Dr. Fyles proves definitely a considerable range of variability in what he calls congrua, and what is without any doubt antigone, Strecker. It seems to be certain that there are two species having a very similar range of variation—the insect that we call the fall webworm in the larval stage, and the insect bred by Dr. Fyles. Of the variability of cunea there is no doubt. I had not been aware, heretofore, that antigone had anything like the same range.In the matter of determining what species Walker had before him a number of factors must be considered, as we have not available for ready examination the actual specimens described. In the first place there but three examples, apparently similar, for no variations are mentioned; but all from Georgia, and there is a very considerable range of variation in size; that is, from 16 to 20 lines, or one-third of an inch in a small species.