In Ent., x., p. 80, I stated that Dogwood was found to be the spring food-plant of this species, that is, of the larvæ proceeding from eggs laid by the form violacea; but probably there are other plants serving the same purpose, some of which bloom earlier than Dogwood, for fresh examples ofthe butterfly. form pseudargiolus, were taken on 21st April and on several subsequent days, and this was long before any of the larvæ feeding on Dogwood could possibly have produced them. prof. J.H. Comstock has recently sent me quite a number of mature larvæ taken by him at Ithaca, N. Y., feeding on the flower heads of Viburnum acerifolium, and in confinement the larvae wil1 eat clover, Nasturtium, Begonia, Asclepias, &c., eating the anthers. But I have been unable to make the females lay eggs on clover in confinement.