386 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Young (sexes alike in all probability, but only one seen — a female). — 

 Similar to adult but with the thighs distinctly barred white and dark 

 neutral gray, the abdomen indistinctly mottled and flecked with 

 whitish. 



Natal down. — Not known. 



Adult male.— Wmg 223-238 (227.3); tail 132-150 (141); culmen 

 from cere 20.5-22.5 (21.6); tarsus 65-73 (69.6); middle toe without 

 claw 30.5-34 (33.5 mm.).«« 



Adult female. —V^ing 233-245 (237. 8); tail 139-157 (136.9) ; culmen 

 from cere 21-22.5 (21.5); tarsus 66-74 (69.8); middle toe without 

 claw 33-34 (33.8 mm.)." 



Range. — Resident in the Tropical Zone from eastern Panama 

 (Veraguas, Perme) thi'ough western Colombia (Bagad6, Barbacoas) 

 to western Ecuador (Quito, Sarayacu, Rio de Oro, Paramba, San 

 Javier, Mindo) ; apparently uncommon throughout its range. 



Type locality. — Ecuador. 



Leucopternis plumbea Salvin, Ibis, 1872, 240, pi. 8, 243 (Ecuador; orig. descr. ; 

 crit.; monogr.). — Sclater and Salvin, Nom. Av. Neotr., 1873, 119 (Ecua- 

 dor).— Gurnet, Ibis, 1876, 475 (Veraguas); List Diurn. Birds Prey, 1884, 76; 

 Cat. Birds Prey, 1894, 25.— Sharpe, Hand-list, i, 1899, 258 (Panama to 

 Ecuador). — Salvin and Godman, Biol. Centr.-Amer., Aves, iii, 1900, 84 

 (Veraguas, Panama, Quito and Sarayacu, Ecuador). — Hakteut, Nov. Zool., 

 ix, 1902, 605 (Paramba and San Javier, Ecuador). — Chapman, Bull. Amer. 

 Mus. Nat. Hist., Iv, 1926, 234 (Rfo de Oro, Mindo, Ecuador). — Peters, 

 Check-list birds of World, i, 1931, 242 (distr.).— Griscom, Bull. Mus. Comp. 

 Zool., Ixxii, 1932, 314 (Perme, Panama) ; Ixxviii, 1935, 300 (Panama- Veraguas; 

 e. Dari6n). 



Urubitinga plumbea Sharpe, Cat. Birds Brit. Mus., i,1874, 216 (Panama, Ecua- 

 dor). — Brabourne and Chubb, Birds South Amer., i, 1912, 69 (Ecuador; w. 

 Colombia). — Chapman, Bull. Amer. Mus. Nat. Hist., xxxvi, 1917, 247 

 (Bagado and Barbacoas, Colombia). 



Urubitinga (?) plumbea Ridgway, Bull. U. S. Geol. and Geogr. Terr., scr. 2, No. 2, 

 1876, 172 (monogr.). 



Leucopternis schistacea plumbea Swann, Synopt. List Accip., pt. 2, 1919, 59; 

 Synop. Accip., ed. 2, 1922, 99 (Ecuador to Panama); Monogr. Birds Prey, 

 i, 1930, 464 (monogr.). — Gtldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 

 xxii. No. 1, 1945, 52, in text (w. Panama to w. Ecuador; meas.). 



Leucopternis schistacea Dug and and Borrero, Caldasia, iv, 1946, 139 (Colombia; 

 Leticia; spec). 



^' Six specimens from Ecuador (4), Colombia (1), and Panama (1): The single 

 Panamanian bird is the largest of the series, wing 238 as against a maximum 

 of 229 mm. in Ecuadorian or Colombian specimens. 



8' Four specimens, three from Colombia, one from Panama. The Panamanian 

 bird is the largest, wing 245 as against a maximum of 238 mm. for Colombian 

 birds. 



