1853.] 451 



III. Subfamily BUTEONINiE. 

 1. Genus Buteo, Cuvier. 



1. Buteo borealis, (Gmelin.) Wilson Am. Orn., vi.,pl. 52. Aud. B. of Am- 

 pi. 51. 



Falco borealis, Gmelin. Syst. Nat., i., p. 266, (178S). 

 Hah. Eastern North America, Fur countries, Wisconsin, Florida, Cuba, 

 Jamaica. 



2. Buteo Swainsoni, Bonaparte. Comp. List, p. 3, (1S38). Rich, and Sw. 

 Fauna Boreali Americana, Birds, pi. 27. Aud. B. of Am., pi. 372. 



" Buteo vulgaris." Rich, and Sw. and Aud. 

 Hah. Western North America, Oregon, California. 



3. Buteo lineatus, (Gmelin.) Wilson. Am. Orn., pi. 53, fig. 3. Aud.B. 

 of Am., pi. 56, 71. 



Falco lineatus, Gmelin. Syst. Nat., i., p. 268, (1788). 

 Hah, Throughout North America. , 



4. Buteo Bairdii, Hoy. (New species.) 



Size smaller than B. lineatus, wings long and pointed, with the third primary 

 longest, second rather longer than the fifth, first about the same length as the 

 sixth. Entire plumage of the upper parts dark brownish with a purplish lustre, 

 especially obvious on the primaries. Plumage of the head and neck behind and 

 some feathers on the back edged and tipped with yellowish white, upper tail 

 coverts yellowish white with transverse bars of brown. Tail above dark ashy 

 brown, with about ten bands of dark brown and tipped with white. Entire 

 under parts and under wing coverts fine pale yellowish white with a few sagit- 

 tate spots of brown on the sides, and a distinct stripe of brown running down- 

 wards from the corner of the mouth. Front at the base of the upper mandible 

 white. Cere, legs and irides yellow. 



Younger ? Entire upper parts very dark brown or nearly black with purplish 

 lustre, and entire under parts with almost every feather having a large longitu- 

 dinal stripe or spot of the same, this color (brownish black) predominating on 

 the breast, and on the throat assuming the form of narrow longitudinal stripes. 

 Flanks and under wing coverts with rounded spots of w hite. Tibiae dark brown 

 with transverse bars and rounded and oval spots of pale reddish white. Upper 

 tail coverts reddish white with their outer edges brown, and with transverse 

 stripes of brown. Under tail coverts yellowish -white with transverse stripes of 

 brown. Stripes from the corners of the mouth wide and conspicuous. Front 

 white, cheeks yellowish white. Sex unknown. 



Dimensions Female. Total length 19^ inches, wing 14, tail S, extent of 

 wings 48 inches, tail about an inch longer than the folded wings. 



Hah. State of Wisconsin. 



Ohs Two specimens of this remarkable Buteo are now in the collection of 

 the Academy, for which it is indebted to Mr. William Dudley, Secretary of the 

 Wisconsin Natural History Association, and to P. R. Hoy, ?.I. D., of Racine, 

 Wisconsin. It bears a general resemblance to the European B. vulgaris, and 

 also to B. pennsylvanicHs, but is quite different from either and from any other 

 species known to me. 



Accompanying Dr. Hoy's specimen were some interesting notes of the manners 

 of this species, with measurements of the recent bird. It is named by him in 

 honor of our mutual and highly esteemed friend Professor Spencer F. Baird, of the 

 Smithsonian Institution, one of the most eminent of American naturalists, and 

 whose exertions have contributed in a most important manner to the development 

 of the natural history of the United States. 



5. Buteo pennsylvanicus, (Wilson.) Wilson. Am. Orn., vi., pi. 54, fig. 1. 

 Aud. B. of Am., pi. 91. 



Falco pennsylvanicus, Wilson. Am. Orn , vi., p. 92, (1812). 

 Hah. Eastern North America. 



6. Buteo Harlani, (Aud.) Aud. B. of Am., pi. 86 



Falco Harlani, Audubon. Orn. Eiog., i., p. 441, (1831). 

 Hah, Louisiana, Mexico. 



