Olive-drab; head very small, and without a prominent crest; antennæ of the males transversely biciliated beneath. Forewings scalloped, with a transverse sinuous pale line near the base; a whitish comma-shaped stigma on a broad undulated dark olive-colored central band, and two transverse undulated lines towards the tip; under side purple in the middle of the disk. Hindwings purple in the middle and at base, with a transverse black spot, and an abbreviated dusky blue band near the anal angle. Body very robust, and with the legs immaculate.

One of the largest species of the genus. A single male was taken on the northern shore of Lake Superior in the summer of 1848, and a fine female was captured in Cambridge, Mass., on the 20th of July, 1849, which have afforded the means for a more full and correct description than has heretofore been given. This species appears to be rare, and has not before been figured. representative of the European S. Tilia and Quercus.

HEPIOLUS ARGENTEOMACULATUS H.

Pl. VII., fig. 6.

It is the

Hepialus argenteomaculatus Harris, Catalogue in Hitchcock's Report, 1st ed. p. 591 (1833).-The same, 2d ed. p. 592 (1835). -Report on Insects injurious to Vegetation, p. 295 (1841).— Gosse, Canadian Naturalist, p. 248 (1840).

Fusco-ochraceus vel cinereo-brunneus; alis primoribus pallidis, ochraceo vel brunneo fasciatis, guttisque duabus prope basin argenteis; secundariis rubro-vel cinereo-ochraceis, immaculatis.

Alar. exp. 23, 33 unc.

Only two specimens of this fine insect have fallen under my observation. They differ much in size and color. The smallest, apparently a male, was taken in Cambridge, Mass., many years ago. When at rest, the wings are very much deflexed, and form a steep roof over the back. The body is light brown; the forewings are of a very pale ashen brown color, variegated with darker clouds and

Hal mm raaminen me above and between de back Tona inom above, margined bedre van stated grangpical band, vildi a endiumed ca each side of the outer size of the wonderen: per edge of the car crimsco-red. Porewings Aucy brown, with three mal cream-uired scs on the vem oza; for you of the ame cior in a ne near the inner mor fin, and several more scattered on the disk. Hindwings deep ware yellow, with the base, the basal edge of the inner margin, a trianglar spot in the middle, alyzing the basal spot, and a broad indented band behind, of a black color. Abdomen dusky above, tawny at tip and beneath. Legs dusky, thighs and tibiæ fringed with crimevar-red hairs.

This fine species was taken on the northern shore of Lake Superior. It belongs to the same group as the European Caja, from all the

known varieties of which it differs in having the arcuated white line on the thorax, and the black band on the hindwings. The situation of this band is not so far back as the black spots found on the hindwings of the allied species. The banded hindwings, with the entirely black or dusky antennæ, will sufficiently distinguish this species from the Arctia Americana, a description of which is here added for the purpose of comparison.

ARCTIA AMERICANA H.

Pl. VII., fig. 5.

Arctia Americana Harris, Report on Insects injurious to Vegetation, p. 246 (1841).

Alis primoribus brunneis, maculis, rivulisque albidis; secundariis fulvo-flavis, maculis unica media reniformi, tribusque posticis rotundis nigris; abdomine fulvo, dorso nigro-quadrimaculato.

Alar. exp. unc. 23.

Head brown, antenna white above, with brown pectinations. Thorax brown above, margined before with an arcuated yellowish white band, which is continued on the outer edge of the shouldercovers; upper edge of the collar crimson-red. Forewings coffeebrown, with three yellowish white spots on the outer edge, and crossed by irregular anastomozing yellowish white lines. Hindwings bright ochre-yellow, with a large reniform central black spot, two round black spots behind, a third smaller spot near the anal angle, and a black dot between the middle and the inner margin. Abdomen tawny, with four blackish dorsal spots. Legs dusky, the thighs and anterior tibiæ fringed with red hairs; the hindmost tarsi whitish, annulated with black.

This species, which is now for the first time figured, was taken by Mr. Edward Doubleday, near Trenton Falls. From the Caja it is distinguished, like the Parthenos, by the arcuated white margin of the thorax, &c. The arrangement of the white spots and rivulets on the forewings is the same as in the European species.

Fan: als augniatas subientats, anticis apice sinuate-truncatis. proje bash apacem vue brume maculat-fasciaus: omnibus postice matunk mƏŞık PAmbode brumie margmen posticun angulumque auben angen.

Alar. exp. 2 une.

Tuis pretty treometer has the form of Ennomos (Euryment) ɑndə ara, and perhaps belongs to the sane subgenus. It is found in Massachusetts as well as of the northern shore of Lake Superior.

The antenna are brown, and are pectmated on in the males. Tue tongue is bal as long as the body, which, with the upper side of the forewings, is entro-yellow; the indwings and under sides are somewhat paler. Tia foreving have a rust-brown costal spot Dear the suowders, a transverse row of spots near the base, a stig matical dot. furet litt spots near the fi, and a very large lozenge scaped spot at the aua angie, of the same brown color, the large spot being bordered before and behind with darker brown. The hindrings have a central brownisi dot, and a large pale brown spot, bordered before and behind with a darker line at the anal angie, which also is deeply tinged with brown

List of Lepidopterous Insects, taken by Professor L. Agassiz on the wirthern shore of Lake Superior.

Poutia Oleracea Harris.

Colias Pelidue? Boisduval,

L PAPILIONES.

Chrystheme? Esper. var.? Boisd

Polyommatus.

Limenitis Arthemis Drury.

Danaus Archippus F.

Argynnis Aphrodite F. (nee Daphnis. Cr., nec Cybele, F.)

Melita Myrina Cramer.

46 Cocyta Cr.