I hardly need an apology for presenting from time to time to the entomological public descriptions of galls of Cecidmyiæ, even when I did not succeed in rearing the fly. Such observations, unless published soon, are very apt to be lost; once published, they gradually accumulate and furnish a welcome material for the future monographer. To facilitate reference, I give here a list of my previous publications on the galls of North American Cecidomyiæ

Allied to precationis and ,gamma. It differs by the distinct yellow shaded geminate t. p. line having but a single acute tooth at vein 2 ; the line running more outwardly at this point, and being othewise even throughout. Also by the shape of the metallic spot ; this is open, silver bordered, running outwardly obliquely from the median vein to the t. p. line at vein 2, sub-triangulate, the bordering lines fusing outwardly to a point, forming an oblique uneven V. The median space below and beyond the metallic mark is shaded longitudinally with obscure chalceous.

The shape of the fore wings is like Scoliopteryx, and the ornamentation is like that genus, while the stigmata are well defined, the course of the lines being similar in the two genera. This is a much more robust form than the European Atethmia xerampelina, and has different shaped, more dentate primaries. Eyes naked, tibiae unarmed. Eucirroedia pampina(Guen.) has the colors of Fodia.

Allied to rubi and conflua. Taken by Mr. Norman in Canada, and considered to be identical with the European rubi in former writings. Abdomen and hind wings paler than in conflua. Fore wings of a darker purply-reddish brown; t. a. line geminate, a black spot before the orbicular and usually the disc between the spots is black stained. Claviform indicated. Subterminal pale, more waved, but like conflua, differing from rubi; beneath the common line is not diffuse as in conflua.

On June 15th, 1874, Mr. Wm. Couper, while collecting on Montreal Mountain, found a larva on Oak, which he kindly gave to me. It appeared fully grown, and was a little over two inches in length. Body onisciform ; general color, gray. Head heart-shaped, strongly bilobed, pale green, with white blotches, twelve short black hairs in front, and near the top of the head there are four small tubercles of a white color, each of which is tipped with a black hair ; head surrounded with a broken border of dark streaks.

A single specimen with the palpi broken off. Head pale yellowish tinged with fuscous. Thorax brown, with the apex whitish. Fore wings gray brown, under the lens appearing yellowish white and brown in irregular blotches, with a distinct white spot on the fold at aout the basal fourth, the usual opposite white costal and dorsal spots at the beginning of the ciliae, a small white spot at the apex, and two others at the base of the dorsal ciliae. Ciliae sordid white, with a narrow brown hinder marginal line about their middle.

Mr. Fred. Tepper has just sent me for examination a very interesting pair of insects taken on the sea shore of Long Island, which approach so nearly the type of O. chandleriin my colle ction from the mountains of Colorado, that I cannot separate them specilically, although there are certain differences, v'hich I give below. The capture is the more valuable since the species of Oncocnemis, so far as known, inhabit only the mountains of Europe, Siberia, Colorado and California.

On Dominion Day, while at Chateaueuay Basin, I collected a number of larvæ which were found feeding on nettle. I secured them in my larva box, and took a quantity of the food-plant with me. When I reached home in the evening I was too busy to examine them carefully, and the next day I found that quite a lot of them had changed to chrysalids.