The specimens on which the present paper has been based were collected by Mr. Trevor Kincaid, of Olympia, Washington. They were all collected near that city except a few, which were taken along the Skokomish River. Great credit is due Mr. Kincaid for bringing together so large a collection. The specimens are deposited in the entomological collection of Cornell Univerisity.

Hemichroa americana, Provancher.

(The alder saw-fly).

Descirbed as a Dineura, but the lanceolate cell is contracted in the middle, not petiolate. The second recurrent nervure is received very near the end of the second submarginal cell, almost at the intersection of second and third submarginal cells.

Eggs laid July 9–10. Round, considerably flattened at base, honey-yellow, shining, under a microscope very slightly and irregularly pitted, of an inch in diameter.

Hatched July 17–18, egg period eigth days.

Young larva—Length, about one-tenth of an inch. Head brown, rather lighter below. Body, dull greenish-yellow, with lead coloured warts and long hairs of a brown colour.

Very few Phalangids have been collected on our mountains, and so it is not surprising that a new species of a genus which in Europe lives in high altitudes should be found on Mt. Washington, New Hampshire. Early in September 1893, Mrs. Annie T. Slosson kindly sent me several vials of arachnids from the White Mts., and among them o vial from Mt. Washington containing six specimens of a beautiful new species of Oligolophus. It differ from the other American species which have been referred to that genus in lacking spines to the femur of the palpus, thus resembling some alpine European forms.

For two or three years past Mr. David Bruce, in S. W. Colorado, has been taking Papilio Bairdii in company with a very different form, P. oregonia, as we have called it, and also with the form I described recently as P. Hollandii, which last is in general like Bairdii, but has the abdomen either with a broad stripe of yellow or almost completely yellow, instead of spotted yellow in rows, as in the Asterias group, and as in typical Bairdii.

When Dr. J. A, Lintner prepared his first annual report in 1882, he, with the aid of Drs. Hagen and Le Conte, failed to discover any record of the clover-destroying habit of this species in Europe, and it was supposed at that time that this was a newly acquired habit, and occurring only in this country.