BIRDS OF NORTH AND MIDDLE AMERICA 383 



1873, 119, part (Mexico; Central America, part).— Salvin, Ibis, 1872, 242, 

 part (monogr.). — Gurney, Ibis, 1876, 470, in text, part (crit.; variations 

 of plumage); List Diurn. Birds Prey, 1884, 75, part (crit. as to spelling of 

 specific name); Cat. Birds Prey, 1894, 25, part. — Sclater, Bull. Brit. Orn. 

 Club, xxxix, 1919, 76, in text (Atoyac, Veracruz; Chimalapa, Oaxaca; 

 Choctum, Guatemala; Brit. Honduras; Honduras). 



Leucopternis ghiesbrechti Ridgway, U. S. Geol. and Geogr. Surv. Terr., ser. 2, 

 Bull. 2, 1876, 174, part (Mirador, Veracruz; Guatemala; monogr.). — Sharpe, 

 Hand-list, i, 1899, 259, part (s. Mexico; Central America, part). — Swann, 

 Synopt. List Accip., pt. 2, 1909, 59, part (s. Mexico). 



Leucopternis gheisbrechti Ridgway, Proc. U. S. Nat. Mus., x, 1888, 572 (Rfo 

 Segovia, Honduras). 



Leucopternis ghiesbreghti Salvin and Godman, Biol. Centr.-Amer., Aves, iii, 

 1900, 82, part (Mirador, Huatusco, Uvero, San Andres Tuxtla, Playa Vicente 

 and Atoyac, Veracruz; Chimalapa, Oaxaca; Choctum, Medio Monte 

 Savana Grande, and Aguna, Guatemala). — Stone, Proc. Acad. Nat. Sci. 

 Philadelphia, 1918, 250 (Gatun, Panama Canal Zone). — Swann, Monogr. 

 Birds Prey, i, 1930, 467, part (monogr.). 



Leucopternis ghiesbreghti ghiesbreghti Swann, Synop. Accip., ed. 2, 1922, 100 

 (s. Mexico; Vera Paz, Guatemala; Honduras). — Griscom, Bull. Amer. 

 Mus. Nat. Hist., Ixiv, 1932, 158 (distr. Guatemala). 



Leucopternis ghiesbrechti ghiesbrechti Bangs and Peters, Bull. Mus. Comp. 

 Zool., Ixvii, 1927, 473 (Presidio and Motzorongo, Veracruz; Mexico). 



Tachy trior chis ghiesbrechti Bonaparte, Compt. Rend., xli, 1855, 651. 



Asturina ghiesbrechtii Schlegel, Mus. Pays-Bas, ii. No, 5, livr. 1, 1862, 11, 

 footnote, part (monogr.); No. 36, livr. 10, 1873, 104, part. 



Urubitinga ghiesbrechti Sharpe, Cat. Birds Brit. Mus., i, 1874, 217, part (Mexi- 

 co). — BoucARD, Liste Ois. r6col. Guat., 1878, 19 (Guatemala). 



Urubitinga ghiesbreghti Rovirosa, La Naturaleza, vii, 1887, 376 (Tabasco; Rio 

 Macuspana). — Beristain and Laurencio, Mem. y Rev. Soc. Cient. 

 "Antonio Alzate," vii, 1894, 225 (Veracruz, Mexico). 



Leucopternis albicollis ghiesbreghti Peters, Check-list Birds of World, i, 1931, 

 241.— Stone, Proc. Acad. Nat. Sci. Philadelphia, Ixxxiv, 1932, 300 (Hon- 

 duras; Lancetilla: Segovia River). — van Tyne, Misc. Publ. Mus. Zool. 

 Univ. Micliigan, No. 27, 1935, 16 (Uaxactun and Chuntuqui, Pet^n, Guate- 

 mala; spec). — Brodkorb, Misc. Publ. Mus. Zool. Univ. Michigan, No. 56, 

 1943, 28 (Mexico: Veracruz and Tabasco). 



LEUCOPTERNIS SEMIPLUMBEA Lawrence 



Semipltjmbeous Hawk 



Adult (sexes alike). — Forehead, crown, top and sides of head, 

 except for the bare lores and circiimocular areas, enth'e upperparts of 

 body, upper wing coverts, and remiges varying from deep neutral 

 gray to dark neutral gray and to slate color, but usually of one shade 

 throughout in any one specimen except the lesser upper wing coverts 

 usually somewhat darker and the top of head sometimes slightly 

 darker than the rest of the upperparts; the upper tail coverts definitely 

 darker, dusky neutral gray; all the remiges white basally on the inner 

 web, the inner primaries and the secondaries with incomplete dusky 

 bars extending from the dark area out into the white; four outer- 



