It was thought strange when it was proved that Colias Keeivaydin and C. eurytheme were seasonal forms of a single species. Still stranger did it seem when Mr. W. H. Edwards proved by breeding that C. eriphyle (alias Hagenii) was also a form of eurytheme, but even after this I was not quite prepared for the conclusiton, forcced upon me by irresistible facts, that in this locality the orange and yellow forms were not only of one species, but actually alternated seasonally, the former being the summer, and the latter the winter form.

In a collection of Hemiptera sent me some time since for identification, were two male specimens of a coccid, and a single white waxy sac, from which one had issued, attached to the upper surface of a small, oval leaf, which at the time, from a supeficial examination, I took to be a mealy bug, Dactylopius longifilis Comstock; but recently on a more careful examination I find to be a species of that interseting genus Orthesia Bosc.

The face above the epistom blackish brown, shining; mouth and a ring around the eyes yellowish; palpi yellowish; maxillary thin, apical joint cylindrical nothced on tip; labial of same length, apical joint fusiform, the conical tip notched.

Antennæ as long as head and thorax, thicker at tip, which is clavate, fuscous, annulated with yellow, except on club; basal joint yellow above, second black; antennæ below largely yellow.