BIRDS OF NORTH AND MIDDLE AMERICA 35 



the inner secondary remiges largely but not wholly confined to the 

 outer webs; the inner webs dusky Prout's brown; shafts of the pri- 

 maries yellowish white below, pale buckthorn brown above; head, 

 chin, throat, and nape bare; the naked skin, somewhat corrugated 

 and sparsely sprinkled with hahlike shafts, dull purplish red with 

 whitish papillae before the eyes and, to a lesser extent, on the crown; 

 cere deeper, lake red; bill challv-white ; iris grayish brown or umber; 

 legs and feet dirty whitish more or less tinged with flesh color (some- 

 times practically solid flesh color) and j^ellowish. 



Young injuvenal phimage. — Similar to adults but with the brownish 

 edges of the feathers of the back, breast, wings, and tail narrower and 

 darker, dusky mummy brown; the skin of the head and neck blackish- 

 dusky neutral gray to slate black and with considerable down of a 

 grayish Prout's brown color on the crown and hind neck. 



A^tal dovm. — Head largely bare, dusky slate-gray to slate-black, 

 crown and occiput sparsely covered with white down; body covered 

 mth long white down above and below. 



Adult male—Wmg 458-497 (481.3); tail 225-255 (245.6); cuhnen 

 from cere 22-24 (22.9); tarsus 59.5-65 (62.8); middle toe without 

 claw 59-67 (62.1 mm.) (7 specimens). 



Adult female —Wing 462-495 (482.0); tail 230-256 (240.1); culmen 

 from cere 21.5-25 (23.5); tarsus 58-67 (62.1); middle toe without 

 claw 57.5-67 (62.8 mm.) (8 specimens). 



Range. — The lower Rio Grande Valley of Texas (Browns vifle) 

 south tlirough TamauHpas to lower tropical portions of Mexico from 

 Veracruz; central Sonora; Sinaloa; Tres Marias Islands; Quintana 

 Roo, Yucatdn, south tln-ough Central America to Panama (Farfan; 

 Canal Zone; Barro Colorado) and to northern Colombia (Rio Frio; 

 Magdalena; Mamatoco, Santa Marta); also in extreme southern 

 Florida (Cape Sable), the Bahamas (Abaco, Andros, Great Bahama, 

 Little Abaco, Elbosv Cay, and New Providence (?)), Cuba, Isle of 

 Pines, Jamaica, Puerto Rico (introduced); possibly formerly in 

 Hispaniola.^* 



Type locality. — ^''America cahdiore"= Veracruz, Mexico, substi- 

 tuted by Nelson (Proc. Biol. Soc. Washington, xviii, 1905, 124). 



Vultur aura Linnaeus, Syst. Nat., ed. 10, i, 1758, 86 (America calidiore; based on 

 Tzopilotta f. Aura Herndndez,25 Mex., 331; Urubu brasiliensibus Marcgrave, 

 Bras., 20720; Willughby, Orn., 68; Ray, Av., 10, 180, Buleo specie gallopavonis 

 Catesby, Carolina, i, p. 6, t. 6 2?; Vulhir galUnse africanse facie Sloan,^^ Jam., 

 2, p. 294, fig. 254; Viiltur pullus, capite implumi, cute crasso rugosa, ultra aperlus 



24 Cf. Wetmore and Swales, U. S. Nat. Mus. Bull. 155, 1931, 108. footnote. 



25 =the present form. 



26 =C. uruhitinga Pelzeln. 

 2' = C. aura scptentrionalis. 



839094—50 4 



