Egg.—Fusiform thick in middle, tapering to a small rounded summit; marked by about 18 longitudianl ribs, these being low, narrow, the spaces between flat and crossed by many fine ridges. Color yellow-green. Duration of this stage about four days.

The discovery by Mr. W. H. Edwards that Colias Hagenii is only a form of C. Eurytheme, as detailed in the Canadian Entomologist for September, while very interesting in itself, serves also to show that this genus is still in a very unsatisfactory state. That a form which so closely resembles Philodice that nine entomologists out of ten would take it for that species, should turn out to be a variety of Eurytheme, emphasizes Dr.Hagen's statement “that reliable differences between these two well known forms are still a want.” Mr. Edwards has also comet to the conclusion that Hagenii is the same as teh form previously named C. Eriphyle by him, as detailed in the November number of the Canadian Entomologist. A glance at the history of this form will be found interesting.

Eggs.—Diameter, .04 of an inch; low conoidal, the edges of the base rounded; striated, fifteen of the striæ reaching the micropyle, sixteen more that do not reach the apex, though but few of these are only half lenght; shallow transverse striæ. Color dull brownish olive. Duration of this period 201 days.

Expanse, ♂, 2.40–2.50; ♀, 2.85–2.90. Head black. Antennæ, ♂, stem brown, pectinations black; ♀, wholly brown. Prothorax white. Patagia white in front, overlaying longer hairs of white and black. Thorax black, with tufts of rust-red hairs behind the patagia. Abdoment black, with a few scattered white hairs toward anal end, and with white or sometimes yellow hairs in segmental spots on sides beneath; ♂ with large anal tuft of rust-red, ♀ without tuft, but tip is hoary with short hairs of sordid white.

Tibiæ calcarate; spurs as long as the two basal joints, or a little shorter; antennæ longer than head and thorax, stout, cylindrical, a little thicker to tip, which is bluntly pointed, but not clavate; palpi about equal, last joint of labials (except in B. longipalpis) with the basal two thirds inflated, fusiform; abdomen long, slender, about half longer than the wings (male); or as long as the wings (female); male appendages very short, less than half the lenght of last segment, stout, cylindrical, very hairy and spinous; a very small ventral triangular plate below and between them.

My last paper in the Proceedings of the Am. Philosophical Society, Philadelphia, contains a number of typographical errors, the most serious of which I corrected subsequently by an “errata” in a later volume, not being able to see the proofs. This paper reviewed the main and first two groups, leaving the Fasciatæ (Catocalinæ Pack.) and the Deltoids unrevised. I would recognise five very unequal groups both in structural value an extent. Adopting Packard's nomenclature so far as he went (this author excluded the Deltoids at the time), we may call these groups subfamilies, but in Europe my Thyatiridœ and the Brephidœ are taken out of the Noctuidœ as distinct families.

Mr. Alfred Wailly, Tudor Villa, Norbiton, Surrey, England, is anxious to obtain speciments of the wild Silk-worms of all parts of the world for exhibition in the Department of Sericulture at the Paris International Exhibition of 1889. In order to make the exhibition as complete as possible, he wishes to obtain specimens of live cocoons, in large quantities or small, with names of food-plants for each species, whenever possible, and also specimens of the moths; any specimens went will be purchased or exchanged, as desired.