RAPTORES— FALCON1DAE— BUTEO SWA1NSONI. 421 



of the auriculars, and maxillary stripe extending across the jugnlum, are nearly uni- 

 form black, in consequence of the enlargement and blending of the streaks. "Iris 

 blown ; cere and base of bill olive-yellow or greenish ; feet yellow." 

 Hab. — Mexico; Arizona (Hensbaw). 



The preceding accurate description has been kindly furnished by Mr. 

 Ridgway, who examined, for the purpose, a very large suite of specimens 

 in the collection of the Smithsonian. 



Captain Bendire writes me that in 1872 he found this hawk breeding 

 in Arizona, and obtained the nest and eggs. The bird was supposed by 

 him to be the Buteo zonozercus, but has since been ascertained to be this 

 species. It thus has a good claim to a place in our fauna, and may indeed 

 be not uncommon in the southern part of the Territory, since two indi- 

 viduals were seen by us during the past season. While riding one day a 

 short distance from Camp Bowie, one of these birds sailed past within a 

 few feet, affording me an excellent opportunity for its identification. On a 

 second occasion, while passing through a narrow canon, about sixty miles 

 north of Camp Lowell, another flew out from a large cottonwood, on one 

 of the lower limbs of which it had been perching ; it was certainly not 

 more than a dozen feet from my head. In each instance, the narrow white 

 band across the tail, with the size and colors generally, established its 

 identity beyond a question. The flight is easy and powerful. 



BUTEO SWAINSONI, Bon. 

 Swainson's Hawk. 



Buteo swainsoni, Bon., Comp. List, 183S, 3.— Bd., P. E. E. Rep., Beckwith's lloute, x, 

 1850, 11, pi. xii, xiii. — Id., IT. S. & Mex. Bound. Surv., ii, pt. ii, 1859, 

 Birds, 3. — Hayd., Trans. Am. Phil. Soc, xii, 18G2, 152.— Coues, Proc. 

 Acad. Nat. Sci. Phila., 1S(1G, 45.— Cooper, Birds Cal., i, 1S70, 470.— Stev., 

 U. S. Geol. Surv. Terr., 1870, 402.— Coues, Key N. A. Birds, 1872, 217.— 

 Snow, Birds Kan., 1872, 4.— Meeeiam, U. S. Geol. Surv. Terr., 1872, 097 

 (Idaho; Wyoming ; Montana). — Yaeeow, Pep. Orn. Specs., 1871, Wheeler's 

 Exped., 1874, 30.— Bd., Brew., & Ridg., N. A. Birds, iii, 1874, 203.— Hen- 

 shaw, Pep. Orn. Specs., 1873, Wheeler's Exped., 1874, 139. — Coues, Am. 

 Nat., viii, 1874, 590 (Montana and Dakota, breeding). — Allen, Proc. Bost. 

 Soc. Nat. Hist., June, 1874, 34. — Coues, Birds Northwest, 1874, 357. 



Buteo oxypterus, Cass., Birds N. A., 1858, 30 (young). — Bd., P. P. R. Rep., Beckwith's 

 Route, x, 1859, 11, pi. xv.— Henry, Proc. Acad. Nat. Sci. Phila., 1859, 

 105 (New Mexico).— Coues, Proc. Acad. Nat. Sci. Phila., 1800, 45.— Cooper, 

 Birds Cal., i, 1870, 480. 



