MUSEUM OF COMPARATIVE ZOOLOGY. 323 



Falco kverianus Gmelin, Syst. Nat., T, 266, 1788. — Wilson, Am. On., VI, 



78, pi. lii, 1812. 

 Falco jamaice.nsis Gmelin, Syst. Nat., I, 266, 1788. 

 Falco aquilinus Bartra.m, Travels, 290, 1791. 

 Falco Harlani Audubon-, Am. Orn., I, 441, 1831. 

 Accipiter rujicaudus Vieillot, Ois. Am. Sept., I, 47, 1807. 

 Buteo ferrugineicaudus Vieillot, Ibid., 32. 

 Buteo fulvus Vieillot, Nouv. Diet. Hist. Nat., IV, 472, 1816. 

 Buteo americanus Vieillot, Ibid., 477. 

 Buteo vulgaris Rich. & Swain*., Faun. Bor. Am., II, 47, pi. xxvii, 1831. — 



Audubon, Syn., 5, 1839. 

 Buteo but coides Nuttall, Man. Orn.. I, 100, 1832. 

 Falco buteo Audubon, Orn. Biog., IV, 108, 1S38. 

 Buteo Swainsoni Bonaparte, Geog. and Comp. List, 3, 1838. — Cassin, 



Ulust. Birds Cal. Texas, etc., 98, 1854. —Brewer, N.Am. Oology, 24, 



1857. — Cooper & Baird, Orn. Cal., I, 476, 1870. 

 Buteo Harlani Bonaparte, Geog. and Comp. List, 3, 1838. — Cassin, Ulust. 



Birds Cal., Texas, etc., 101, 1854. — Cassin, Baird's Birds N. Am., 14.— 



? Bryant, Proc. Bost- Soc. Nat. Hist., VIII, 115, 1861.— Cooper & 



Baird, Orn. Cal., I, 473. 

 Buteo montanus Nuttall, Man. Orn. I (2d ed.), 112, 1840. — Cassin, Baird's 



Birds N. Am., 26. — Coues, Proc. Phil. Acad. Nat. Sci., 1866, 43. — Cooper 



& Baird, Orn. Cal., I, 469. 

 Buteo Bairdii Hoy., Proc. Phil. Acad. Nat. Sci., 1853,451. — Cassin, Baird's 



Birds N. Am., 21. 

 Buteo insignalus Cassin, Birds Cal. and Texas, 102, pi. xxi, 1854. — Cassin, 



Baird's Birds N. Am., 23. — Cooper & Baird, Orn. Cal., I, 474. 

 Buteo calurus Cassin, Proc. Phil. Acad. Nat. Sci., 1855, 281. — Cassin, Baird's 



Birds N. Am., 22. — Cooper & Baird, Orn. Cal., I, 471. 



Not apparently uncommon, but far less numerous than the next 

 species. 



The Buteoninaz, or the group of hawks to which the present and the 

 two following species belong, is well known to embrace species more 

 variable in color than those of any other section of the Falcoriidce, al- 

 though all the members of this family are more or less remarkable for in- 

 dividual and other variations of plumage. The present species, however, 

 admitting for it the wide variation in this respect herein claimed, scarcely 

 equals the immense range of color variation well known to characterize its 

 near ally and representative in the Old World, the Buteo vulgaris auct. 

 (Falco buteo Linne). Six specimens of this species in the Museum from 

 Switzerland and Germany, received under the name Falco buteo, vary in 

 color as follows : One is almost entirely black ; another is nearly black 

 throughout, with obscure narrow transverse bands of ferruginous on the 

 VOL. II. 21 



