On plate iv. of the “Fauna Boreali-Americana,” Kirby gives a figure of the ♀ of the above species. In June, 1878, while collecting at the Godbout River, Lower St. Lawrence, I captured two males of this species, both on the same day. While Alypia Langtonii, Couper, were abundant in the same locality, no other specimens of A. MacCullochii were seen.

Microgaster utilis, n. sp.

Length .11 of an inch. Head, thorax and abdomen of the males uniform black, the females the same with the exception that the under side of the second and third basal joints of the abdomen are tawny. Antennæ fuscous, somewhat rufous at base. Legs and feet tawny, rather pale, the knees of the hind pair dusky, the most so in the males.

In the following descriptions I have made use of certain terms which will need explaining. The subdorsal line is midway between the dorsal line and the spiracles ; the stigmatal line includes the spiracles ; the subdorsal space lies between the dorsal and subdorsal lines; the stigmatal space is between the subdorsal line and the spiracles.

The following list is furnished in compliance with the request of the Editor of the Canadian Entomologist, published some time ago, some unsettled questions regarding species and distribution having delayed its preparation from time to time.

The list is intended to be as complete as possible, and to include all described species known to have been taken within the State limits, or so nearly adjacent thereto as to certainly belong to the Illinois Fauna. In order to roughly designate the distribution within the State I have attached an to all species from the northern portion, of whose capture I have personal knowledge, and have further affixed a to such species as are not known to occur in the southern portion of the State.

Eustrotia secta Grote, Can. Ent., xi., 199.

This species, which is frail and wide-winged, has much the appearance of a Thalpochares, but the primaries have an accessory cell.

Pegala.—At the extreme south, and restricted principally to the southern part of the Gulf States and Florida, this species appears. Fabricius described it in 1775, in Syst. Ent.; says it is fuscous, the fore wing with a rufous (rufa) band and a single ocellus ; the hind wing with a single ocellus above, 6 below, with ferruginous irides and white pupils.

The caterpillars known under the common name of “woolly bears” belong to the family of Arctians, and most of the species in the moth state are very pretty objects. The commonest of all the species is Spilosoma virginica, a pure white moth which appears on the wing in May, when it deposits its clusters of round yellow eggs on the under side of the leaves of many plants.

Thalpocharas patruelis Grote, Can. Ent., viii., 27.

The fore wings are 12-veined, no accessory cell, 9, 10 out of 8, costal nervules rather crowded, cell open. Hind wings 8-veined, vein 5 a little weaker than the rest, independent. This little species, of which I have both sexes, is rusty ochrey, the hind wings sub-pellucid, washed with ochrey externally.