Thomson, in his review of the Scandinavian Hymenoptera, recognized four genera of Pemphilidine wasps: Rhopalum, Entomognathus, Lindenius and Crabro, the last of which he divided into a dozen subgenera. Two of these, Coelocrabro and Hoplocrabro, were propounded there as new.

The material used in the preparation of this article included four specimens of the European Scotodes annulatus Esch., two in the Leconte collection and two in my own; three specimens of Anelpistus americanus Horn from the collection of Mr. C. A. Frost, three from the Leconte collection, four from the H. C. Fall collection, fifteen from the general collection at the Museum of Comparative Zoology, and one from my own collection.

During the past few years officers of the Forest Insect Unit of the Division of Entomology have reared a number of specimens of a species of Olesicampe from sawflies of the genus Pikonema. The species differs from any of the named forms of the Canadian National Collection, or in the United States National Museum, according to Mr. R. A. Cushman, to whom I sent specimens, and as far as I can discover there is no name in the literature which would apply to it. The following description is therefore offered.

Close to timberline in the northern part of the Olympic Mountains, particularly in the Gray Wolf Range of these mountains in the State of Washington, a small race of Plebeius lupini Bdv. occurs that is quite distinct in character. The Olympic Mountains, adjacent to the sea and snow-capped throughout the entire year, present quite a different environment to that which exists in the habitat of many insects.