Some time ago Mr.Henry G. Willard, of Grinnell, Iowa, very kindly sent me of the full grown larvæ of this species. I made a few notes at the time which may be of use, owing to the fact that nothing has been publihsed in regard to the early stages of this butterfly. The food plant at the home of the insect is Rumex longifolius, but they readily ate our common species of dock found here. The full grown larva were onisciform in shape, grass greein in colour, and 20 mm in length. Most of them had a narrow, claret-coloured dorsal stripe, and the entire body, under a glass, was seen to be clothed with minute black hairs.

The following notes of observations of some stages of these two little saw-flies are fragmentary and incomplete, but they are now given as they may be of some assistance to others working upon this group of insects.

Taxonus nigrisoma, Nort., Larva.—The fully grown larva is cylindrcal, and 10 to 12 millimeters long. It is of a pale green colour above, very slightly darker towards the sides above the spiracles, the spiracle line being marked by very minute dark dots one to each segment; and the under side (including the abdominal or prop legs) is of a dull whitish colour.

The young larva of Zarœa Americana appears in the beginning of July on Menyanthes trifoliata. It lies curled on the underside of the leaf. Its head is black, and its body lead-colour above and greenishwhite beneath. It develops into the most beautiful larva of any of the Tenthredinidae that I am acquanited with.

Recently, while studying the habits of this beetle in the peach orchards of Catawba Island, on the south shore of Lake Erie, I was surprised to observe that the fall attack had invariably been made on the east or southeast side—which is here the land side of the trees—and old trees, where the bark of the trunks was very rough, were more seriously affected. On mentioning the fact of this apparent discrimination in point of attack to my friend Dr. D. S. Kellicott, he recalled that the same phenomenon occured about Buffalo, New York.

In discovering a North American representative of the European Brassicœ, I proposed for this latter and our Occidentis the generic title Copimamestra, based on the tibial claw. In the Philadelphia List the term Barathra is resuscitated out or Hübner's Verzeichniss, p. 218, for the genus, but incorrectly. Hübner refer two species, Brassicœ and Albicolor, to his genus, and I was free to use for one of them the new term. I need not state that Hübner took no note of the structure of Brassicœ, and that Albicolor differs structurally.

Prionia levis, n. var. or sp.

Primaries without the delicate frosted or silvery appearance, and without the numerous short, fine, strigate, brown lines of bilineata. The brown scales are present, but are uniformly and evenly distributed, save where they form the two brown lines which cross the wing, and a little darker shading near the outer edge and apex. These two transverse lines are about a third wider apart that in bilineata, the second narrowly edged externally with the clear, pale yellow ground-colour of the wing.

Ichthyura vau Fitch.

Egg.—The colour of the unhatched eggs is deep purplish-pink, pale around the bottom; slightly shining.

First stage.—Head bilobed, bearing a few hairs, shining black; width .45 mm. Dorsum broadly bluish-white, except the black cervical shield and anal plate and joints 5 and 12, which latter ar hardly enlarged, coloured vinous-brown. Whole lateral area also brown but paler, and broken into patches. Feet black outwardly. Hair fine, very long laterally, pale, darker dorsally, arising singly from black conical tubercles with the normal arrangement.

In describing this species in Vol. XXII., page 133, of the Canadian Entomologist, I had before me two males, one from Texas and one from Ohio. I have now before me a fine fresh female from Champaign, III., the first of this sex I have seen, and I will give here some additional characters of the species. The forewings are fawn, a little darker than in the type, but the latter was evidently a little faded. The hindwings have a few dusky scales in the outer border near the anal angle.

Sir, —The Henry Edwards Entomological Corresponding Chapter of the Agassiz Association invites entomological students who read this notice to join its ranks. Members are expected to keep each other informed of the progress of their work in special lines of study, and to contribute to the published reports. During the winter one or more courses in Elementary Entomology will be conducted. The initiation fee is 50 cents.

The genus Melanchroia has been associated in our lists with Gnophaela to form a family Pericopidœ. As a matter of fact it is a veritable geometer, with little more relation to Gnophaela than is expressed in the statement that both are Macro-Heterocera! This has, indeed, been recognized in Europe, and Mr. Butler, when identifying my specimens as M. cephise, added the remark “belongs to the geometrites”.