594 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



cheeks and auriculars dark mummy brown to fuscous; feathers of chin, 

 throat, breast, sides, and upper abdomen mummy brown with the 

 shafts pale, dusty warm buff, the color spreading out to form a broad, 

 large medioterminal spot of the same, giving rise to a buff and dark 

 brown streaked appearance; feathers of the lower abdomen, flanks, 

 and thighs dusky warm buff, irregularly banded with two or more 

 bars of mummy brown; sometimes nearly immaculate; lower portion 

 of thighs and the under tail coverts usually immaculate warm buff. 



Natal down. — Not known. 



Adult male.—Wmg 269-298 (284.5); tail 181-204 (191.2); culmen 

 from cere 20-24 (22.1); tarsus 52-59 (53.9); middle toe without claw 

 37-41 (39mm.).^* 



Adult female ~Wmg 278-306 (291.3); tail 190-211 (196.5); culmen 

 from cere 20-24 (22.8); tarsus 52-61 (56); middle toe without claw 

 37.5-43 (39.8 mm.). ^* 



Range. — Resident in dry, tropical, open grasslands and thinly 

 forested areas from Panama (Calobre, Chepo, Bay of Panama, Sona, 

 San Miguel and Saboga Islands, Canal Zone) and Colombia (Bogota, 

 Ocafia, Cauca, Valencia, Bucarange, San Antonio, Cali, La Manuelita, 

 La Palma, Chicoral, Honda, Rio Frio, Calamar, Barrigon, Boyacd, 

 Espinal, Caqueta River, Jimenez) eastward through Venezuela (Alta- 

 gracia, Caicara, Quiribana de Caicara, Ciudad Bolivar, Orinoco 

 Valley, Guarico, Apure, Cumanacoa, Puerto La Cruz, Santa Lucia, 

 Maripa, Rio Caura, La Eluncia); to British Guiana (Berbice, 

 Demerara, Alerume Mountains). Recorded vaguely in literature 

 from Costa Rica as \yq\\, but there seem to be no definite records. 



Type locality.— San Miguel Island, Pearl Islands, Bay of Panama. 



Milvago chimachima (not Polyhorus chimachima Vieillot) Cabanis, in Schom- 

 burgk's Reis. Brit. Guiana, iii, 1848, 741. — Gurney, Descr. Cat. Rapt. 

 Birds Norfolk and Norwich Mus., pt. 1, 1864, 27, part (Bogotd, Colombia); 

 List Diurn. Birds Prey, 1884, 13, part; Cat. Birds Prey, 1894, 18, part.— 

 Salvin, Proc. Zool. Soc. London, 1870, 214 (Calobre, Panama); Ibis, 1886, 

 78 (Merume Mountains, British Guiana). — Wyatt, Ibis, 1871, 121 (Ocaiia, 

 Colombia), 382 (coast region, Colombia). — Sclater and Salvin, Norn. Av. 

 Neotr., 1873, 122, part (Panama); Proc. Zool. Soc. London, 1879, 541 (Cauca, 

 Colombia). — Ridgwat, Bull. U. S. Geol. and Geogr. Surv. Terr., ser. 2, 

 No. 6, 1876, 468, part (Veraguas, Panama). — Salvin and Godman, Ibis, 

 1880, 177 (Valencia, Sierra Nevada de Santa Marta, Colombia; habits); 

 Biol. Centr.-Amer., Aves, iii, 1901, 127, part (Colombia; Calobre, Chepo, 

 Bay of Panama, Panama). — Berlepsch, Ibis, 1884, 437 (Angostura, Vene- 

 zuela); Journ. fiir Orn., 1884, 316 (Bucaramanga, Colombia). — Zeledon, 

 Anal. Mus. Nac. Costa Rica, i, 1887, 125 (Costa Rica). — Sharpe, Hand-list, 

 i, 1899, 244, part.— Bangs, Proc. New England Zool. Club, iii, 1902, 20 

 (Sona, Panama). — Berlepsch and Hartert, Nov. Zool., ix, 1902, 112 



" Fourteen male and 16 female specimens from Panama, Colombia, and 

 Venezuela. 



