234 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



white, the remiges obscurely banded with fuscous-black on the inner 

 webs, which become paler internally to grayish or grayish white; 

 lower back and rump fuscous-browoi, each feather widely edged with 

 white; the upper tail coverts whitish with a submarginal wavy band of 

 brown and with a basal two-thirds of the inner web also brown, the 

 outer web white; the rectrices neutral gray with a slight silvery sheen, 

 and obscurely and narrowly barred with deep neutral gra}'^; upper ab- 

 domen irregularly flecked with pale buff; lower abdomen, thighs, 

 flanks, and under tail coverts dirty buff, the feathers with large sub- 

 terminal fuscous areas which show very conspicuously; under wing 

 coverts fuscous-black edged with pale buff. 



Natal down. — Pale buffy on underparts and lower back, darkening 

 through avellaneous and wood brown on the upper back and wings to a 

 mixture of wood brown and benzo brown on the top of the head; 

 a dark, fuscous-brown band through the eyes; eyelids jet black; bill 

 glossy black above and horn color below; feet flesh color, claws pale 

 horn brown (Sennett). 



Adult waZe.— Wings 404-430 (416.4); tail 194-207 (200.6); culmen 

 from cere 23.5-27.5 (25); tarsus 92-95 (93.7); middle toe without claw 

 39.5-49 (43.5 mm.) (5 specimens). 



Adult Jemale.~Wmg^ 423-450 (438.8); tail 198.5-211 (201.4); cul- 

 men from cere 25.5-28.5 (27.5); tarsus 84.5-93 (87.1); middle toe 

 without claw 41-47.5 (44.8 mm.) (4 specimens). 



Range. — Resident in Lower Austral Zone of southern Texas 

 (Cameron to Tom Green and Concho Counties north to Houston and 

 Galveston Island), southern New Mexico, and Arizona (between 

 Florence and Red Rock; Phoenix; casual), south through Mexico, 

 Guatemala, Costa Rica, Panama, etc., to the northwestern part of 

 Colombia west of the Magdalena River (Medellin; Santa Isabel), and 

 the Merida region of Venezuela. 



Type locality. — MedeUin, Colombia. 



Buteo erythronotus (not Haliaetus erythronotus King) Sclater, Proc. Zool. Soc. 

 London, 1857, 211 (Orizaba); 1859, 3G8 (Jalapa, Veracruzj, 389 (Talea, 

 Oaxaca). — Salvin and Sclater, Ibis, 1860, 401 (Antigua, Guatemala). — 

 Lawrence, Ann. Lye. Nat. Hist. New York, ix, 1868, 133 (San Jose and San 

 Antonio, Costa Ricaj; ix, 1869, 207 (M6rida, Yucatdnj. — Frantzius, Journ. 

 fiir Orn., 1869, 368 (Costa Rica). 



Tachytriorchis pterodes (not Falco pierocles Temminck, 1823) Cabanis, Journ. 

 fur Orn., 1869, 210 (Costa Rica; crit.). 



Brileo pterodes ScHLEGEh, Mus. Pays-Bas,Buteones, 1862, 13, part (spec. Mexico). — 

 Pelzeln, Reis. Novara, Zool., i, V6g.,1865, 16, part (Mexico). — Sclater and 

 Slavin, Proc. Zool. Soc. London, 1870, 782 (M6rida, Venezuela); Nom. Av. 

 Neotr., 1873, 119, part.— Lawrence, U. S. Nat. Mus. Bull 4, 1875, 41 

 (Tapana, Ozxaca; colors of unfeathered parts;. 



Buteo albicaudatus (not of Vieillot, 1816) Salvin, Proc. Zool. Soc. London, 1870, 

 215 (Calovebora and Chitra, Veraguas, Panama). — Gurnet, Ibis, 1876, 



