Feathers of the face, pure white, or very pale cream color. General plumage, of a predominating pale yellowish-white, or cream color, of various shades in different specimens, sometimes nearly pure white, especially on the under parts, and always marked with brown, frequently very pale and indistinct, in the same general manner as in characteristic specimens of _B. virginianus_, var., _atlanticus_, but with the lines and stripes much less numerous and paler; tarsi and toes, nearly pure white. Size, in some specimens, quite as large as in the common variety, and the plumage with more on less of the same reddish fulvous at the bases of the feathers. Of the specimens of this bird that we have seen, one is Dr. Hoy’s original, and another was brought from California, by Mr. Bell. The latter is the smaller, and is probably a male. Dr. Hoy’s specimen, which appears to be a large female, has the upper mandible with a more prominent lobe than is usual in specimens of this species. Variety, _magellanicus_. Strix magellanicus. Gm., Syst. Nat., I. p. 286. (1788.) Buff. Pl. Enl., I. pl. 385. Strix nacurutu. Vieill., Nouv. Dict., VII. p. 44. (1817.) Bubo ludovicianus. Daudin, Traité d’Orn, II. p. 210? Very similar to the common bird of eastern North America, and has all the plumage at base fulvous, very variable in color, frequently lighter than the common variety, but sometimes very dark; plumage behind the eyes, generally pale cinereous, but in some specimens more or less tinged with fulvous. This variety inhabits, apparently, the whole of South America, and, probably, also southern North America. Dimensions. _Female._—Total length, 22 to 25 inches; wing 15 to 16; tail, 10 inches. _Male_, total length, 19 to 21 inches; wing, 14 to 15; tail, 9 inches. The western and southern varieties producing smaller specimens than the eastern and northern. Hab. The whole of North America, western South America; Hudson’s Bay (Richardson); Canada (Dr. Hall); Wisconsin (Dr. Hoy); Washington territory (Dr. Cooper); Minnesota (Mr. Pratten); Vermont (Mr. Thompson); Oregon (Dr. Townsend); California (Dr. Heermann); Texas (Mr. Schott); Indian territory (Dr. Woodhouse); Mexico (Lieut. Couch). Breeds in Pennsylvania and northward. Spec. in Mus. Acad., Philada. Obs. With numerous specimens before us from various parts of America, we are unable to recognise any differences sufficient to establish specific distinctions, and we have therefore provisionally designated the above four varieties. All of them vary considerably in shade of color in different specimens.