The subfulcate primaries ally this group to the Platypteryginœ, and a certain vague resemblance to the Geometridœ may be found in the tendency which the upper surfaces of the wings show to display the same pattern on both wings. The ocelli are absent, the oral structure undeveloped, the hind wings are without frenulum. The species form mostly large cocoons, and the characteristics of the family are pronounced in this sub-family of silk-spinners. The male antennæ are feathered to the tips, each joint bearing a double pectination.

Having been requested by my friend, Mr. Wm. H. Edwards, to make observations on Danais Archippus during the seasons of 1887 and 1888, and subsequently having written to him the result of such observations, he requested me to publish in the Canadian Entomologist the substance of what I had already written him in my letter. I wrote out a paper about July 5th, which, however, was lost in the mails, and the paper now sent is a partial copy of the original, though somewhat altered, as the first was over four months old.

My good friend Mr. Howard, in his article entitle “The Chalcid Genus Rileya,” published in the October Can. Ent., p. 191, makes several inaccurate statements; and, in the lines “An interesting interference in the adoption of the generic name Rileya has recently taken place between Mr. Ashmead and myself,” implies that I knowingly appropriated this name for a genus in the Eurytominœ, after he had decided to us it for one in the Encyrtinœ when I had no such knowledge, therby placing me in an unenviable position before my colleagues.

In the August part of the Canadian Entomologist, pp. 149–154, I notice an article on this subject by my friend, Mr. Scudder, and I may, perhaps, be able to add some additional remarks.

The volume on Exotic Moths, published by Duncan in Jardine's “Naturalist's Library,” contains (pp. 66–71) a short account of Abbot's life and works, and incorporates the notice by Swainson, to which Mr. Scudder refers.

Mr. Grote takes occasion in Can. Ent. vol. xx., p. 168, to criticise my reference to Cerathosia to the Arctiidœ, contending that it is a Noctuid. He complains that I do not give “the reason why it belongs to the family.” This I hasten to supply, and must beg Mr. Grote's pardon for having presumed him conversant with the characters separating the two families. All authorities give for the Noctuidœ a furcate dorsal or internal vein of primaries, while the costal vein of secondaries is from the root, sometimes united with the sub-costal a short distance from base.