The principal motive in publishing the present paper in the desire to fulfill a promise made to Rev. J.H. Keen, several years agom to write a description of an apparantly new and very interesting Staphylinid discovered by him in British Columbia. For one reason or another I was compelled to defer this work, but having now an opportunity to comply with the wished of my valued friedn and correspondent of many years, the present occasio is made available to draw up a little paper, containing in addition a number of novelties received from various collectors from time to time.

I have recently received a Guatemalan species of Centrinus, which cannot be distinguished from lineellus, described by LeConte from a unique said to have been taken in California. While drawing up a redescription of this species (Ann. N.Y. Acad. Sci., VI., p. 592), it was impossible to avoid a suspicion of some mistake in the locality, because of the tropical appearance of the species and its apparent lack of harmony with the Pacific coast Barid fauna in general. It now seems probable that, like Xystropus Californicus, of Horn, the Centrinus lineellus, of Le Conte, is an adventitious importation from Centrel America, which should be removed from the list of our native Coleopetra.

This species was named by Clemens* from the larval habit and foodplant only. He did not publish a description of the moth, nor, so far as I am aware, has any one else bred it, until very recently Mr. Arthur Gibson rediscovered the larvæ on basswood.

The Locustidæ (Tettigonidæ Rehn), comprise the long-horned or green grasshoppers, katydids and camel or stone crickets. They have for the most part of southern distribution, and hence are but poorly represented in Ontario, except in the south-western part, to which the majority of the species are confined.

The genus Apista was proposed by F. Smith in 1861, to contain the species Apista opalina, Sm., which was described from a single female from Ega, Brazil. So far as I know the specimen is still unique. In Dalla Torre's Catalogue the genus is placed just after Melipona, which is the reason, no doubt, why Schrottky says nothing about it in his work on the solitary bees of Brazil. Ashmead, in his tables, places it in the Andrenidæ, and I have no doubt that this is its correct position.

Culex siphonalis, sp. nov.—♀. Head brown, occiput covered with pale yellow scales, antennæ brown, basal joint and two following ones testacesou; proboscis pale brown, with dark brown scales scattered over the surface, covering the apical fourth; palpi dark brown, with minute terminal joint oval in form, pointed at the apex and slightly spiny. Mesonotum covered with pale yellow and brown scales at the sides and with a median vitta wholly of brown scales, the pale yellow scales sometimes forming a narrow border to this vitta; scutellum brown, with yellowish-brown bristles on the posterior margin; metanotum evenly brown; pleura brown, clothed with patches of dirty white scales; halteres yellowish-white, black at the apex.

Thymaris Slingerlandana new species—♀. Length, 4.5mm.; ovipositor about one-third the length of the abdomen. Black, subopaue, the head and thorax very finely, microscopically punctate, with a sparse, glittering, white pubescence, which is dense or more distinct on the lower part of the face, the cheeks, the pleura and the metanotum; ocelli pale or opalescent; palpi whitish; scape and pedicel of antennæ the tegulæ, the front and middle coxæ and tronchanters, the hind trochangters except at base of first joint, and all tarsi, except as hereafter noted, honey-yellow, the hind coxæ, base of hind trochanters, a spot at base of hind tibiæ outwardly and at apex, and the apices of hind tarsl joints 1, 2 and 3 and joints 4 and 5 entirely, black; rest of legs pale ferruginous; wings hyalime, iridescent, the stigma and veins light brown, metathorax incompletely areloated, the areola alone complete or distinct pentagonal; abdomen subfusiform longly petiolated, about one-half longer than the thorax, subcompressed towards apex and entirely black, except the ventral fold, at apex of the petiole and on segments 2 and 3, which in honey-yellow.

Scarcely a season passes that some newly-introducted, pernicious insects from across the eastern or western oceans are not reported in the United States or Canada. These immigrants, leaving being them their natural enemies, and apparently greatly invigorated by the change of climate, usually multiply with rapidity and soon prove exceedingly destructive.

Mr. F.L. Washburn, State Entomologist of Minnesota, reports the occurence at St. Anthony Park of the imported Alder and Willow Beetle, Cryptorhyncus lapathi, Linn., which was introduced in a shipment of Carolina poplars from the State of New York last spring.