Faun. Bor. Am. Birds, pl. 27; Aud., B. of Am., pl. 372, oct. ed., I. pl. 6. General form and appearance very similar to _B. borealis_, but rather larger, and with the wings longer; neck and upper part of the breast brown; tibiæ light rufous, with transverse bars of a deeper shade of the same. Tail bright rufous, narrowly tipped with white, and with a subterminal band of black; upper tail-coverts rufous and white; entire other upper parts dark umber-brown, with partially concealed ashy-white and pale fulvous bands and spots on the scapulars and shorter quills. Lower breast white, tinged and with irregular transverse bands of pale-rufous; abdomen with a broad irregular transverse band composed of longitudinal lines and oblong spots of brown, and tinged with rufous. This abdominal band nearly obsolete in some specimens. Under tail-coverts yellowish-white; under surface of the tail silvery-white, with a reddish shade. Young. Upper parts dark-brown, edged and spotted with white tinged with rufous; tail above ashy-brown, with dark-brown bands, and tipped with white. Under parts white, on the sides and abdomen with large oblong spots of brown; tibiæ and under tail-coverts white, with transverse bars and large spots of brown. Dimensions. _Female_—total length, 23 to 26 inches; wing, 16½ to 17; tail, 9 to 10 inches. _Male_—smaller. Hab. Northern and western regions—Rocky Mountains and Oregon (Dr. Townsend); California (Mr. Bell); Wisconsin (Dr. Roy); Mexico (Rivoli collection). Obs. Nearly related to _B. borealis_, and much resembling it. We have never seen, however, specimens of the latter with the brown space on the neck and breast so extensive as in specimens of the present species brought from California by Mr. Bell, nor with the transverse bars on the abdomen, as is usual in this species, and as represented in the plate in Fauna Boreali Americana. It is brought frequently in collections from Western America; and the young may be _Buteo ventralis_. Gould. 3. Buteo lineatus. (Gmelin.) The Red-shouldered Hawk. The Winter Falcon. Falco lineatus and hyemalis. Gm., Syst. Nat., I. pp. 268, 274. (1788.) Falco buteoides. Nutt., Man., I. p. 100. (1st edition, 1832.) Vieill., Ois. d’Am. Sept., pl. 5; Wils., Am. Orn., pl. 53, fig. 3; Aud., B. of Am., pl. 56, 71, oct. ed., I. pl. 9; Nat. Hist. N. Y., pl. 6, fig. 13.