Eyes large and close together on the vertex. palpi, base of tongue and large basal joint of the antennæ, head and upper surface of the thorax, clothed with long blackish hairs, darker than the fore wings are, except at their base. The antennæ are more than twice the length of the wings and silvery white, the basal third dotted above with blackish. Wings and legs rich dark brown, changing with the light to green, blue, violet, bronze and golden.

♂.This species has the fore wings and thorax of a soft brown. The primary is covered by a pea-green patch, which does not reach the margins and is defined outwardly by a narow dark line running once deeply inwardly below vein 2 and slightly opposite the cell. Hind wings light yellowish. It appears to be allied to paenulata Clem., unknown to me, but differs by the shape of the green patch and in its not being bordered with white.

The species of Homoptera stand in need of a revision. They are usually but partially and confusedly named in such collections as I have had access to. With regard to the generic title, its acceptance is only provisional. Two species, Phacocyma lunifera Hübn. and Phaeocyma fluctuaris Hü., are unknown to me. The descriptions hitherto published in this genus are difficult to use for identification ; no comparative characters are given, no analysis of the lines entered upon.

Instead of “extreme tip hooked backwards,” as in the generic diagnosis, it would be better to say extreme tip curved outwards.

P. fuscostrigella. N. sp.

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.

This moth, which is very common in and about Montreal, is described by Walker, in a paper by W. S. d'Urban, published in Vol. 5 of the canadian Naturalist (1860), entitled “A systematic List of Lepidoptera collected in the vicinity of Montreal.” It is also taken at Quebec, but I met with only two specimens there during several years' collecting.

♂ ♀. This species in ornamentation approaches partialis Led., Taf.9, fig. 8. Both wings clear pale lemon yellow. Primaries crossed by four equidistant lines, of which the first three from the base form brown spots narrowly outlined in black on the costal region. The third spot coalesces with an inferior spot on the line. The second line widens into a small spot on internal margin. The fourth line has a small dark spot on costa and one on internal margin.

The male is now taken by Mr. Jas. Angus. The species is larger than obscura,agreeing with it in tone and in the white fringes of hind wings; it may be distinguished by the strongly marked median lines of primaries with a deeper toothing. The lines in obscura are thread-1ike, inconspicuous, and with shallower indentations. The opinion expressed that simulatilis is the ♀ of obscura must be the result of error; as I remarked at the time of describing the species, such a sexual variation would be without a parallel in the genus.

The writers who are engaged in the work of giving us an account of the different kinds of Butterflies and Moths inhabiting North America, seem to fall into two categories with respect to their ideas of classification. As in other departments of Natural Science, the Entomologists differ principally in their conception of what constitutes a genus. They are either lumpers, making their genera very wide, or splitters, making their genera restricted and dependent upon less conspicuous details of structure.

In coitus 26 are 4 species, 3 of which are put in Myrina Fab., one of the genera of the Lycaeninæ, and 1 in Euselasia Hüb., of the Lemoniinæ. But the coitus Euselasia is in the other Tribe, and third Stirps of same, the Napaeæ.

Frontal costa slightly sulcate below the ocellus in the ♂. Merely depressed at the ocellus in ♀.

Median carino of pronotum slight, cut by the last transverse incision behind the middle, the anterior part slightly arcuate. Lateral carinæ distinct only on the flat posterior lobe. Pronotum with sides slightly divergent; obtuse angled behind.

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.