Now that the observations of my yound friend, W. D. Marsh, on this species, have been given in the Can. Ent. (xx., p. 45), I think no reasonable person can dubt that it is at least three-brooded in New England, and that the late butterflies hibernate there. Very late in the fall of 1887, Mr. Marsh saw individuals flying, long after severe frosts had been felt, and still later, he had butterflies come from pupæ. These late fliers are the hibernators.