216 FALGONIDiE, DIURNAL BIRDS OF PREY. GEN. 159. 



one specimen known, which has not lieen referred to anj^ described species, 

 but which cannot be considered as establishing one. Cass., Proc. Phila. 



Acad. 1856, 253, and in Bd., .31; Coop., 472 cooperii. 



^ . -O Harlan's Buzzard. General color Ijlackish, nearly uniform, the tail nearly 

 ^^ concolor with the rest of the plumage, or mottled lengthwise with ashy, 

 rufous and white, and having a dark subterminal bar (in the young brown 

 banded with black) ; inner webs of quills extensively white. Of nearly the 

 size and form of the following species ; tibial feathers remarkably long and 

 flowing. "Louisiana ;" Aud., Orn. Biog. i, 441, v, 380, pi. 86, and B. Amer. 

 i, 38, pi. 8; NuTT., i, 105. An obscure species, variously interpreted by 

 different writers. See Lawr., Ann. Lye. N. Y. v, 220 ; Cass., 111. 101, and 

 in Bd., 24; Bryant, Proc. Bost. Soc. N. H. viii, 109 ; Coues, Proc. Phila. 

 Acad. 1866, 45; Ridgway, ibid. 1870, 142; Coop., 473. Different "black 

 hawks" appear to have received this name, but Mr. Ridgway informs me that 

 , he believes he has the true harlanii, and that it is a good species, harlanii. 

 ^ Red-tailed Buzzard. Hen Hawk. Adult dark brown above, many feathers 



^ with pale or tawny margins, aud upper tail coverts showing much whitish ; 



below white or reddish-white, with various spots and streaks of different 

 shades of brown, generally forming an irregular zone on the abdomen ; 

 tail above brigJitcheatnut red, with sul)termiual black zone and narrow whitish 

 tip, below pearly gray; wing coverts dark; young with the tail grayish- 

 brown barred with darker, the upper parts with tawny streaking. A large 

 stoutly-built hawk; $ 23; wing 15J ; tail 8^ ; <? 20 ; wing 14; tail 7. 

 WiLS., vi, 76, 78, pi. 52, f. 1, 2 (adult and young) ; Nutt., i, 102; Aud., 

 ' j^- i, 32, pi. 7 ; Cass, in Bd., 25. This is the ordinary bird, abundant in 

 \ (A Eastern North America, where it is subject to comparatively little variation. 



'^ , t> ' 111 the West, a form with the throat dark colored, and the under parts exten- 



sively rufous, is B. monlaniis Cass., Proc. Phila. Acad. 1856, 39, and in 

 Bd., 26 (but not of Nuttall). Coop., 469; B. " suiainsonii" Cass., 111. 

 98 {not tlte true sioainsonii ; see below). Another western, melanotic form, 

 in which the whole plumage is dark chocolate-brown, with the tail red and 

 sometimes a large red patch on the Ijreast, is B. calurus Cass., Proc. Phila. 

 Acad, vii, 1855, 281, and in Bd., 22; figured in Pacific R. R. Rep. x, pt. 

 iii, pi. 14 ; Coues, Proc. Phila. Acad. 1866, 44. An nnpublished variety 

 from Cape St. Lucas is B. lucasanus Ridgway, Mss. . . borealis. 

 \ \J y' lied-Shoiddered Buzzard. General plumage of the adult of a rich fulvous 

 ' , cast; above, reddish-brown, the feathers with dark brown centres; below a 

 lighter shade of the same, with narrow dark streaks and white bars ; quills 

 and tail blackish, conspicuously banded with pure white, tlie bend of the 

 tving oranfje-broivn. Young plain dark brown aljove, below white -with dark 

 streaks; quills and tail barred with whitish ("winter falcon," i^. hi/emalis 

 WiLS., iv, 73, pi. 35, f. 1 ; Aud., Orn. Biog. i, 364, pi. 71 ; F. buteoides 

 Nutt., i, 100). Nearly as long as B. borealis, but not nearly so heavy; 

 tarsi more naked ; $ 22 ; wing 14 ; tail 9 ; ^ 19 ; wing 13 ; tail 8 (average). 

 Eastern North America, very al)undant. Wils., vi, 86, pi. 53, f. 3 ; Nutt., 



