The species is closely allied to C. polygama Guen. Its distinctive features may be more clearly appreciated by a differential cotnparison with that species. The basal region is conspicuously and broadly shaded with black, deepening toward the anterior transverse line ; in polygama, shaded with ferruginous. The anterior transverse line is moderately oblique in its general direction, tending to the posterior third of the internal margin, geminate, distinctly separated by white below and slightly above the submedian : in polygama the line is quite oblique, tending to, or very near to, the internal angle; preceded below the submedian by gray and ferruginous scales.

Elytra and wings longer than body; elytra spotted; wings blue at base, gradually merging into black.

Female–Vertex broad; middle foveola circular, open in front with a slight median carina; frontal costa rather narrow, somewhat expanded at ocellus; sulcate, expanding at lower extremity. Lateral costa nearly parallel to frontal, Median carinn of pronotum crested, as in Œ Carolina, only much higher ; cut in front of middle by last transverse incision of pronotum.

Both sexes of a new genus and species referable to the group Ptilodeutes are represented in specimens taken by Mr. Geo. Norman (No. 52) at St. Catharines, and for which I propose the name Ellida gelida. A male of this species is also in the collection of the Buffalo Society, from New York State. The eyes are naked, ocelli absent, legs rather short and unarmed. The maxillæ are moderate ; labial palpi short, applied to the front, second article shaggily haired, third distinct.

Since the reprint of Kirby's Fauna Boreali-Americana began, much has been learned concerning the species of Coleoptera therein described or mentioned, so that at the present time very few remain unidentified. Through the kindness of the authorities of the British Museum. every facility was granted to Mr. Leconte and myself for the study of Kirby's types, and the results of these studies have already been made known by Dr. Leconte. It will be noticed in very many places that the synonymy here given differs very greatly from that given by Mr. Bethune, who compiled from the best known sources all that was at the time known or guessed concerning Kirby's species.

For a long time that school of Entomologists which has for its basis the view that there are but few genera in the Butterflies and Moths, and that the more minute characters which these insects offer are not of sufficient value to support genera, have held an almost undisputed sway in the scientific literature on the subject. The first opponent of these views was Jacob Hübner, whose works form the subject of the present paper. A single author, in the comparatively obscure town of Augsburg, in Germany, Jacob Hübner fonnd no adherents to his views, and his works fell into obscurity.

The form of the palpi is that of Anybia langiella St., as represented Ins. Brit., v.3, but the wings are a little longer than those of langiella are there represented, though the hinder pair have the same form. The neuration of the fore wings is that of L. epilobiella(fig'd loc. cit.) except that the apical vein is obsolete in the single specimen examined by me ; that of the hind wings also resembles that of epilobiella; indeed, if the dorsal and submedian veins were represented in the figure of epilobiella, and the sub-apical or discal branch was produced forwards into the cell,the neuration would be that of this species.