426 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



hair brown; iris brown; tarsi and toes yellow; bill and claws blackish. 



Natal down. — Not known. 



Adult male—Wmg 430-449 (435.3); tail 360-385 (376.1); culmen 

 from cere 29-34 (31.1); tarsus 103-115 (108.1); middle toe without 

 claw 43-52 (47.2 mm.).i* 



Adult female.— Wmg 425-484 (465.4); tail 390-^30 (403); culmen 

 from cere 34.5-39 (36.7); tarsus 113-118 (115.8); middle toe without 

 claw 47-55 (50.4 mm.). ^^ 



Range. — Resident in forested areas from Honduras (Ceiba), Costa 

 Rica (Talamanca, Cuabre, Rio Sicsola), and Panama (Tapaliza, 

 Banana River, Obaldfa, Changuinola, Lion Hill) to Colombia (Rio 

 Salaqui and Rio Jurad6, Choc6), British Guiana (Bartica Grove), 

 and French Guiana ("Cayenne"); south through Brazil (Para, 

 Tonantins, Rio Solimoes; upper Amazonia; Camacan; Rio Cachoeira; 

 Bahia; Minas Geraes; Sao Paulo; Arroyo Grande, Rio Grande do Sul) 

 to eastern Peru (Chyavetas, Yurimaguas), Paraguay, and northeastern 

 Argentina (upper Rio Parand). Apparently nowhere numerous. 



Type locality. — Cayenne. 



Falco gxdanensis Daudin, Trait6 d'Orn., ii, 1800, 78 (Guiana; based on P^tit 

 Aigle de la Guiane Mauduyt, Encycl. M^th.). — Latham, Suppl. Index Orn., 

 1801, p. viii (Cayenne). — Maximilian, Beitr. Naturg. Bras., i, 1830, 90 

 (Ilheos or Rio Cachoeira and Camacan, Brazil). 



Morphnus guianensis Cuvier, R^gne Anim., i, 1817, 318. — Stephens, in Shaw's 

 Gen. Zool., xiii, pt. 2, 1826, 17. — Cabanis, in Schomburgk's Reis. Brit. 

 Guiana, iii, 1848, 738.— Gray, List Spec. Brit. Mus., ed. 2, pt. 1, 1848, 20 

 (Brit. Guiana); Hand-hst, i, 1869, 16, No. 143. — Bonaparte, Consp. Gen. 

 Av., i, 1850, 30; Rev. Mag. Zool., vi, 1854, 537. — Burmeister, Syst. tjbers. 

 Th. Bras., ii, 1856, 66.— Pelzeln, Journ. fiir Orn., viii, 1860, 337, part 

 (crit.); xi, 1863, 121, part (crit.); Orn. Bras., Abth. 1, 1868, 4; Abth. 4, 1870, 

 397. — RiDGWAY, Proc. Boston Soc. Nat. Hist., xvi, 1873, 71 (Guiana). — 

 Sclater and Salvin, Nom. Av. Neotr., 1873, 120, 302 (Chyavetas and 

 Yurimaguas, e. Peru). — Sharpe, Cat. Birds Brit. Mus., i, 1874, 222 (British 

 Guiana; e. Peru) ; Hand-list, i, 1899, 259.— Gurney, Ibis, 1877, 435, in text 

 (descr. young); 1878, 86 (upper Amazons; fresh colors of unfeathered parts); 

 List Diurn. Birds Prey, 1884, 45; Cat. Birds Prey, 1894, 22.— Taczanowski, 

 Orn. Perou, i, 1884, 133. — Berlepsch and Ihering, Zeitschr. Orn., 1885, 

 188 (Arroyo Grande, Rio Grande do Sul, s. Brazil). — Salvin, Ibis, 1886, 75 

 (Bartica Grove, British Guiana). — Koenigswald, Journ. fiir Orn., 1896, 

 384 (Sao Paulo, s. Brazil). — Ihering, Rev. Mus. PauHsta, iv, 1900, 163 

 (Cantagallo, s. Brazil) ; vi, 1904, 338 (Paraguay), 450 (Rio Jurud, Amazonia). — 

 Salvin and Godman, Biol. Centr.-Amer., Aves, iii, 1900, 88, pi. 63 (Lion 

 Hill, Panama; Guiana; Amazonia). — Bangs, Bull. Mus. Comp. Zool., xxxix, 



1903, 142 (Ceiba, Honduras). — Bertoni, An. Cient. Parag., No. 3, ser. 1, 



1904, 7; Anal. Soc. Cient. Argentina, Ixxv, 1913, 79; Fauna Parag., 1913, 43 

 (upper Rio Parand). — Ihering and Ihering, Av. Brazil, 1907, 94 (Rio 

 Grande do Sul, Amazonia, Bahia, Minas Geraes, and Sao Paulo). — Berlepsch, 



" Six specimens from Costa Rica, Panama, and Brazil. 

 " Five specimens from Panama, "Guiana," and Brazil. 



