The first to express this belief and put it in a tangible shape before the public was Mr. A. G. Butler, who published a paper in the Ann. Mag. Nat. Hist., based upon a collection of moths made by Lord Walsingham in Oregon. He states he does not hesitate to stay that he believes that the different forms do not represent several distinct species, but different forms or varieties of one extremely varaible species.

The pale or yellow coloured species of Gortyna, the caterpillars being internal feeders, pupating, however, in the ground, prepare us for the Nonagriini. We have, however, in North America, a pecculiar tribe which I have called Arzamini, and which I here interpolate. The caterpillar was first discovered by Prof. Comstock in Florida Lakes, in the leaf-stalks of the pond lily. This was the larva of A. vulniflca var. melanopyga, and subsequently in the lake at Ithaca, the larva of the typical vulnifica was observed by the same distinguished entomologist.

Since my article of the North American Callimorphas appeared in the Canadian appeared in the Canadian Entomologist for October, 1887, a number of papers upon the same subject, and containing certain criticisms of my views, appeared in subsequent numbers of this magazine, and in Entomologica Americana; and, in addition, I received certain letters upon the same subject from entomologists to whom I had sent copies of my article.

In the beginning of July last I discovered in a bed of Typha latifolia, in the neighborhood of Montreal, a large number of the larvæ of Arzama obliquata. I have visited the spot repeatedly, and have had the larvæ under daily observation. One remarkable circumstance concerning them is that they are liable to attacks from the maggots of a fly belonging to the Ortalidæ, viz.:—The Cheœtopsis œnea of Wiedman, the Ortalis trifasciata of Say.

The eggs are deposited by the butteflies, singly, on the upper surface of the leaves of the food-plant, the Malwa. They are nearly cylindrical, but thicker in the middle, the base and top quite flat, and rather abruptly rounded. The longitudinal ribs project beyond the summit; color green, of a slightly bluer tint that the leaves. Length 7 mm.

The following is a list of butterflies caught near Fort Qu'Appelle, Northwest Terr., by Mrs. Cora E. Rose and her two little sons. Mrs. Rose describes the locality as follows:—“Those sent were all caught within a radius of about half a mile, in the territory of Assiniboia, thirty miles north of an old Hudson Bay Post called Fort Qu'Appelle, and distant west from Winnipeg some three hundred and twenty-five miles; the only foliage is willow and poplar.”