306 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



list, i, 1809, 8, No. 58.— Coues, Key North Amer. Birds, 1872, p. 218.— 



RiDGWAY, Proc. U. S. Nat. Mus., viii, 1885, 75 [=77] (crit.; —B.swainsoni 



young). 

 Buteo swainsoni oxyptenis Ridgway, in Baird, Brewer, and Ridgway, Hist. 



North Amer. Birds, iii, 1874, 266.— Goode, U. S. Nat. Mus. Bull. 20, 1883, 



309. 

 Poecilopternis oxypterus Henry, Proc. Acad. Nat. Sci. Philadelphia, xi, 1859, 105. 

 Buteo harlani (not Falco harlani Audubon) Bryant, Proc. Boston Soc. Nat. Hist., 



viii, 18G1, 115 (descr.; crit.). — Cooper, Orn. California, Land Birds, 1870, 



473, part (descr. of youg from Fort Mojave). 

 Buteo (jutturalis Maximilian, Journ. fiir Orn., 1858, 17 (upper Missouri River; = 



normally colored adult). 

 Buteo fuliginosus Sclater, Proc. Zool. Soc. London, 1858, 356 (Tamaulipas, 



Mexico) ; Trans. Zool. Soc. London, 1858, 267, pi. 62. — Baird, Cassin, and 



Lawrence, Birds North Amer., 1860, pi. 15, fig. 1. — Gurney, Ibis, 1876, 



235 (crit.). 

 Buteo albonotatusl {not of Kaup) Lawrence, Ann. Lye. Nat. Hist. New York, 



ix, 1868, 133 (San Jos(5, Costa Rica; crit.). 

 Buteo alhicaudatus (not of Vieillot) Sclater, Proc. Zool. Soc. London, 1869, 634 



(Conchitas, Argentina). 

 Buteo pterocles (not Falco pterocles Temminck) Lee, Ibis, 1873, 136 (Rio Gato, 



Entre Rfos). 

 Buteo obsoletus (not Falco ohsoletus Gmelin) Sharpe, Cat. Birds Brit. Mus., i, 



1874, 184 (Mexico; Patagonia; etc.). — Burmeister, An. Mus. Nac. Buenos 



Aires, iii, 1888, 241 (Patagonia). — Beristain and Laurencio, Mem. y Rev. 



Soc. Cient. "Antonio Alzate," vii, Nos. 7, 8, 1894, 226 (Mexico; distr.).— 



ScHALOw, Sitzb. Naturf. Freunde Berlin, 1897, No. 5, 70 (Masufuera, w. 



Chile). — HoLMBERG, Segundo Censo Rep. Argent., i, Aves, 1898, 506. — 



Martens, Hamb. Magalh. Sammelr., Vogel, 1900, 6 (Patagonia). — del 



Campo, Anal. Inst. Biol., vii. No. 3, 1937, 336 (Morelos; Xochitepec, spec). 

 ? Buteo {Asturinal) aethiops Philippi, Arch, fiir Naturg., Ixv, Band 1, 1899, 167, 



168 (central provinces of Chile); Anal. Mus, Nac. Chile, entr. xv, sect. 1, 



Zool., 1902, 16, pi. 8 (fig.). 

 Urubitinga anihracina anthracina Willett, Pacific Coast Avif., No. 21, 1933, 188 



(sw. California; hypothetical; eggs; probably referable to Buteo swainsoni; 



crit.). 

 Parabuteo unicinctus harrisi Peyton, Condor, xxxiv, 1932 (Red Creek Canyon, 



Ventura County, Calif.); xlii, 1940, 128 (1932 spec, ident. corrected). 



BUTEO PLATYPTERUS PLATYPTERUS (Vieillot) 



Northern Broad-winged Hawk 



Adult. — Normal phase (sexes alike in color): A narrow frontal line 

 buffy white to buffy; top of head, nape, scapulars, interscapulars, back, 

 rump, and upper wing coverts varying from benzo brown and hair 

 brown to fuscous and fuscous-black, the feathers of the occiput and 

 nape with fairly conspicuous white bases and edged with whitish to 

 mikado brown; the upper wing coverts gradually paling toward the 

 edges, the feathers of the back more uniformly dusky, causing, in 

 most specimens, a blackish appearance; upper tail coverts hair brown 

 to Vandyke brown, tipped with white and crossed by a concealed bar 



