BIRDS OF NORTH AND MIDDLE AMERICA 585 



DAPTRIUS AMERICANUS AMERICANUS (Boddaert) 



South American Carrion Falcon 



Adult (sexes alike). — Exactly like that of Daptrius americanus 

 guatemalensis, but smaller, and, on the average, with more grayish 

 white in the cheeks and auriculars than the northern form, and with 

 the mantle washed with dull grayish. 



Juvenal (sexes alike). — Like the adult, but lacks the grayish tone 

 on the nape and interscapulars. 



Natal down. — Not known. 



Adult male.— Wing: 323-354 (338); tail 240-263 (248.5); culmen 

 from cere 23.6—26 (24.4) ; tarsus 51.8-54.7 (53.1) ; middle toe without 

 claw 40.5-44.3 (42.5 mm.).^ 



AduU female. —Wing 345-349; tail 240-252; culmen from cere 24- 

 25.5; tarsus 55-55.5; middle toe without claw 43-43 mm.* 



Range. — Resident in the Tropical Zone from Darien, Panama (Rio 

 Chioaque, Jesucito, Cana, Obaldia, Ranchon) south thi'ough Colom- 

 bia (Bogota, Medellin, Remedios, Neche, Antioquia, Truando, 

 Turbo, Salaqui, Puerto Valdivia, La Morelia, Tucurinca) ; Vene- 

 zuela (San Antonio, Perico, Caura, rapids of Piritu, Maipures, rapids 

 of Astures, Orinoco); Trinidad; British Guiana (Camacusa; Bartica; 

 Demerara, Berbice, Ituribisi, Kamakabra, and Cako Rivers) ; French 

 Guiana (St. Georges d'Oyapock) ; Dutch Guiana (Saramaccapolder) ; 

 Brazil (Amazonia — Rio Capim, Rio Majii, Rio Jamauchim, Rio 

 Jurud, Borba, Pard; Peixe — Boi, Rio Guama; Piauhy^ — Santa Philo- 

 mena; Maranhao — Rio Parnahyba, Fazenda Inhuma, Alto Parana- 

 hyba, Grajahu, Rio Pardo, Rio Ilheos, Rio Thesouras; Matto Grosso — 

 Engenho do Gama, Matto Grosso, Chapada, Rio Roosevelt; Sao 

 Paulo — Ypanema, Goyabeira, Itapura, Rio Feio, Sal to Grande do 

 Paranapanema ; Parand); Ecuador (Gualaquiza, Guayaquil, Valle 

 del Rio Zamora, San Javier, Napo, Gualea, Alonguinche (9,000 feet!), 

 Esmeraldas, Pato de Pajaro, Rio de Oro, Rio Suno, San Jose); to 

 eastern Peru (Chyavetas, Monterico, Chanchomayo, Rio Perene, 

 Junin, upper Rio Ucayali); and Bolivia (Cochabamba, Rio Secure). 

 Type locality. — Cayenne. 



Falco americanus Boddaert, Tabl. PI. Enl., 1783, 25 ("Cayenne , . . aiitres partes 

 de TAmerique meridionale," based on Aigle d'Am^rique BuflFon, Hist. Nat. 

 Ois., i, 198; Daubenton, Planches Enlum., pi. 417; Red-throated Falcon 

 Latham, Synop. Birds, i, 1781, 97). — Latham, Index Orn., i, 1790, 13. — 

 Shaw, Gen. ZooL, vii, pt. 1, 1809, 88. 



Astur americanus Daudin, Traits d'Orn., ii, 1800, 79, in text to Falco nudicollis. 



Ibycter americanus Gray, List Spec. Brit. Mus., pt. 1, ed. 2, 1848, 28; Hand-list, 

 i, 1869, 4, No. 25.— Strickland, Orn. Syn., i, 1855, 22. — Sclater, Proc, 

 Zool. Soc. London, 1857, 16 (Bogotd, Colombia), 1858, 451 (Gualaquiza, 



^ Five specimens from Darien, Panama; Surinam; and Ecuador, 

 • Two specimens from Darien, Panama; and Venezuela. 



