C. Sappho, Strecker.—Last season five specimens of this rare species were taken near here, and it was found about ten miles further north than before. It is as constant in its markings as any species.

C. Retecta, Grote.—Both the pale and the dark forms of this species were taken last year, with intergrades. I should probably have taken them this season, but I was away from home at the time they were flying. In the woods the habits of the two forms are alike.

In the preparation of the present paper I have used articles by myself which have appeared in the “Popular Science Monthly,” in the pages of “Silliman's Journal,” and elsewhere. I have also noticed what has been printed bearing on the subject by other writers. I have tried to present the whole subject as it now appears to me, at the risk of repeating myself in part. Ihis seemed at times excusable if not unavoidable, but as it is my own writings that I have chiefly borrowed from, the use of quotation marks is unnecessary, the more so as I have here gone freshly over the subject, digesting my previous observations and adding new ones before preparing the present chapter in a history of our North American Lepidoptera. Some of my views, as here stated, were put forth in a lecture I held in 1885, before the Bremen “Naturwissenschaftlichen Verein.” I shall be glad if this paper adds to the interest naturally evoked by this field of study in Natural History.

In the middle of September, 1886, Prof W. G. Farlow sent to me several specimens of the heads of Achillea (probably A. millefolium L.) collected on Mt. Washington. They correspond well with the deformity described by Dr. Fr. Thomas in Giebel's Zeitschr., 1872, vol. 39, p. 464, on A. moschata Wulf. The flowers are to a large part changed in white hairy sacs or galls, containing a number of living Phytoptas. As far as known to me, this gall is not yet described from the U. S., and is very similar to those of A. millefolium described by Mr. Fr. Loew, Verhdl. Wien. Z. B. Ges., 1878, vol. 28, p. 130, which is to be found in Baron Thuemen Herbar. mycolog. oeconom. Suppl., I., No. 60. Our collection possesses a specimen by Prof. Thomas with the indication of Tylenchus (Anguillula) millefolii Loew.

Mr. H. W. Turner, U. S. Geol. Survey, San Francisco, Cal., has sent to me Phryganid cases from Mt. Conness, Mono Co., living in water at an altitude of over 10,500 feet. They are 15 m. m. long, the front half made by irregular small bits of stones, the apical half of short bits of pine leaves, and the case being narrower; around the case are placed longer parts of pine leaves or grasses in a herring-bone fashion. A few dry larvæ and the shape and arrangement of the cases show them to belong to the family of Limnophilidæ, and to the group of Hallisus.

Other cases were collected from a small lake on the north side of Mt. Dana, at an altitude of over 11,500 ft. These cases are smaller, 10 m. m. long, of little bits of mica and other stones, more cylindrical, sloping a little to the end. They seem to belong to the family of Sericostomidæ, which is at least not contradicted by some remnants of dry larvæ.