Comma; dimorphic forms Harrish and Dryas, both figured in But. N. A., Vol. 1.

In Can. Ent., v., 184, Oct., 1873, I gave the result of breeding this species from eggs laid by the form dryas, viz., 6 dryas, but many more of Harrisii, establishing the dimorphism, Since that time I have raised several broods from the egg, and both before and after 1873 recorded in my journal the history of several lots of larvæ found by me. I have therefore some material for illustrating the peculiarities of the species. At Coalburgh there are three broods annually, and the butterflies of the third brood hybernate. The hybernating females deposit their eggs last of April or early in May, and the first brood of the butterflies emerges from chrysalis about 1st June; but should the weather be cold during May, then from the middle to last of June.