7. Buteo insignatus. Cassin. _New species._ (March, 1854.) The Canada Buzzard. Form robust; wings rather long, third quill longest, secondaries emarginate at their tips; quills unusually broad; tail rather short, slightly rounded; tarsi feathered in front below the joint, naked behind, and having in front about ten transverse scales. Under wing-coverts and under tail-coverts white, the former striped longitudinally with pale-ferruginous, and some of them transversely with dark-brown, the latter with transverse stripes of pale reddish-brown. Plumage of the tibiæ dark-ferruginous mixed with brown. Throat and a few feathers in front white, with narrow lines of black. Entire other plumage above and below dark-brown, nearly every feather having a darker or nearly black line on its shaft. Quills above brown, with a purple lustre, beneath pale-ashy, with their shafts white, and irregularly barred with white near their bases. Tail above dark-brown, with an ashy or hoary tinge, and having about ten obscure bands of a darker shade of the same color, beneath nearly white, with conspicuous bands of brown, the widest of which is next to the tip, which is paler. Tarsi and feet yellow. Sex unknown. Dimensions. Total length (of skin), 17 inches; wing, 14½; tail, 7½ inches. Hab. Canada (Dr. M’Culloch). Spec. in Mus. Nat. Hist. Soc. of Montreal, Canada. Obs. Of this very remarkable little Buzzard one specimen only has come under our notice, and is that above described. It belongs to the collection of the Natural History Society of Montreal, by whom it was most kindly sent to Philadelphia for examination at our request, through the good offices of M. M’Culloch, M. D., a distinguished physician and naturalist of that city. In color, though a true _Buteo_, this bird differs from any known American species, and more resembles in that respect some stages of the young plumage of _Circus hudsonius_ or _C. æruginosus_. It was captured in the vicinity of Montreal. II. GENUS ARCHIBUTEO. Brehm, Isis, 1828, p. 1269. TRIORCHIS. Kaup, Syst. Eur. Thier., p. 84. (1829.) BUTAETES. Less., Traité, p. 83. (1831.) General characters very similar to those of _Buteo_, but with the tarsus densely feathered to the base of the toes, but more or less naked on the hind part. Toes short; claws moderate; wings rather long. Contains about six species, of both continents. 1. Archibuteo sancti-johannis. (Gmelin.) The Black Hawk. The Rough-legged Buzzard. Falco sancti-johannis and NOVÆ-TERRÆ. Gm., Syst. Nat., I. pp. 273, 274. (1788.) Falco niger. Wils., Am. Orn., VI. p. 82. (1812.) Buteo ater. Vieill., Nouv. Dict., IV. p. 482. (1816.) Falco spadiceus. Gm., Syst. Nat., I. p. 273? Wilson, Am. Orn., VI. pl. 53, figs. 1, 2; Faun. Bor. Am., Birds, pl. 28; Aud., B. of Am., pl. 422, oct. ed. I. pl. 11.