BIRDS OF NORTH AND MIDDLE AMERICA 385 



and Geogr. Surv. Terr., ser. 2, Bull. 2, 1876, 177 (monogr.; Old Harbor and 

 Talamanca, Costa Rica); Proc. U. S. Nat. Miis., x, 1888, 592 (Rfo Segovia, 

 Honduras). — Zeled6n, Anal. Mus. Nac. Costa Rica, i, 1887, 126 (Talamanca, 

 Costa Rica). — Swann, Synopt. List Accip., pt. 2, 1919, 60; Synop. Accip., 

 ed. 2, 1922, 102. 



Leucopternis semiplumbea Sclater and Salvin, Exotic Orn., pt. 8, 1868, 121, 

 pi. 61; Nom. Av. Neotr., 1873, 119 (Costa Rica; Panama); Proc. Zool. Soc. 

 London, 1879, 540 (Remddios, Antioquia, Colombia). — Lawrence, Ann. Lye. 

 Nat. Hist. New York, ix, 1869, 145 (Valza, Costa Rica).— Salvin, Ibis, 1872, 

 243 (monogr.). — -Gurney, Ibis, 1876, 475, in text (crit.; Veragua; Antioquia, 

 Colombia); List Diurn. Birds Prey, 1884, 76; Cat. Birds Prey, 1894, 25.— 

 Sharpe, Hand-list, i, 1899, 259. — Salvin and Godman, Biol. Centr.-Amer., 

 Aves, iii, 1900, 84 (Rfo Seg6via, Honduras; Valza and Talamanca, Costa 

 Rica; Veraguas, Lagima de Pita, and Punta de Sabana, Panama; Colombia). — 

 Hartert, Nov. Zool., ix, 1902, 605 (Paramba and San Javier, nw. 

 Ecuador). — Carriker, Ann. Carnegie Mus., vi, 1910, 463 (Gudcimo, Cari- 

 blanco de Sarapique, Rio Sicsola, and El Hogar, Costa Rica; habits). — 

 Brabourne and Chubb, Birds South Amer., i, 1912, 69 (Colombia). — 

 Chapman, Bull. Amer. Mus. Nat. Hist., xxxvi, 1917, 247 (Bagado and Los 

 Cisneros, nw. Colombia; crit.); Bull Amer. Mus. Nat. Hist., Iv, 1926, 235 

 (nw. Ecuador). — Stone, Proc. Acad. Nat. Sci. Philadelphia, 1918, 250 

 (Panama; Canal Zone). — Swann, Monogr. Birds Prey, i, 1930, 473 

 (monogr.).— Peters, Check-list Birds of World, i, 1931, 242 (distr.); Bull. 

 Mus. Comp. Zool., Ixxi, 1931, 310 (Almirante, Panama). — Griscom, Bull. 

 Mus. Comp. Zool., Ixxii, 1932, 314 (Perme, Ranchon, Panama); Ixxviii 

 1935, 300 (Caribbean lowlands of Panama; 6 records). 



Buteo semiplumheus Gray, Hand-list, i, 1869, 9, No. 73. 



Urubitinga semiplumbea Sharpe, Cat Birds Brit. Mus., i, 1874, 220 (Panama; 

 Costa Rica). 



LEUCOPTERNIS PLUMBEA Salvin 



Plumbeous H.iwk 



Adult (sexes alike). — Entire head, except for the bare lores and 

 circumocular areas, and entire body above and below, slate gray to 

 slate, the feathers with very fine, darker shaft lines of dark neutral 

 gray; becoming dusky neutral gray to black on the upper and under 

 tail coverts; upper wing coverts dark neutral gray to dusky neutral 

 gray; remiges blackish, washed with pale fuscous on the inner webs 

 and white basally on the inner webs, the inner webs crossed by six 

 to eight bars of fuscous-black, the bars extending over the outer webs 

 as well in the secondaries; five outermost primaries sinuated on the 

 inner web ; outermost primary about the same length as the secondaries, 

 much (60-65 mm.) shorter than the longest primary (fourth or fifth 

 from outside); thighs faintly barred with white; rectrices black 

 crossed by a narrow white band about two-thirds of their length from 

 the base, and with concealed white spots near the base, and narrowly 

 tipped with white; under wing coverts and axillars white sparsely 

 flecked with dusky grayish fuscous; cere, circumocular area, and feet 

 orange; claws and bill black. 



