Very similar in general form to the preceding. Above light umber-brown; many feathers, especially of the head and neck behind, edged with yellowish white and fulvous. A wide transverse band or belt on the abdomen brownish-black; other under-parts yellowish-white, with a few longitudinal lines and spots of brownish-black; quills ashy-brown, with a large basal portion of their inner webs white; tail at its base white, which is also the color of the greater part of the inner webs of its feathers almost to the tip; terminal portion light umber-brown; tip white. Plumage of the tibiæ and tarsi pale reddish-yellow, striped longitudinally with brown. Dimensions. _Female_—total length, 21 to 23 inches; wing, 16 to 17; tail, 9 inches. _Male_—smaller. Hab. All of North America; Europe; California (Mr. Bell); Wisconsin (Dr. Hoy). Spec. in Mus. Acad. Philada. Obs. The bird here inserted as identical with the European _Archibuteo lagopus_ has been usually regarded, by late naturalists, as the young of the species immediately preceding. Such may be the truth of the case, and our only reason for giving it thus is, that after careful comparison and examination of numerous specimens, we find it absolutely impossible to distinguish it, by any character whatever, from the European bird. Whether two birds can be exactly the same in all their characters, so far as presented by specimens, and yet be distinct in species, is a question that we are not prepared at present practically to decide. We regard it as quite possible, however, that the present may be the young of _A. sancti-johannis_. It is one of the most common species of its family. Mr. Bell’s specimens from California are, so far as we can see, exactly the same as the European bird, differing from eastern specimens only in very unimportant characters. 3. Archibuteo ferrugineus. (Licht.) The Western Rough-legged Buzzard, Buteo ferrugineus. Lichtenstein, Trans. Berlin Acad., 1838, p. 428. Archibuteo regalis. Gray, Genera of Birds. I. pl. 6. (1849, plate only.) Larger than either of the two preceding. Bill wide at base; wings long; tarsi feathered in front to the toes, naked and scaled behind. Adult. Tibiæ and tarsi bright ferruginous, with transverse stripes of black, irregular and indistinct on the latter. Entire upper-parts striped longitudinally with dark-brown and light-rufous, the latter color predominating on the rump and lesser wing-coverts. Quills ashy-brown, lighter on their outer webs, and with the greater part of their inner webs white; tail above reddish-white, mottled with ashy-brown; tail beneath pure yellowish-white. Under-parts of the body white, with narrow longitudinal lines and dashes on the breast of reddish-brown and narrow irregular transverse lines of the same color, and black on the abdomen; flanks and axillary feathers (under the wing) fine bright-ferruginous.