346 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Valley; Savana Grande, Escuintla; between San Antonio and Paramos (6,000 

 feet); Sierra de la Minas, Guatemala; La Libertad, El Salvador). 



Rupornis rufirauda griseo^auda Dearborn, Publ. Field Mus. Nat. Hist., No. 125, 

 1907, 82 (Los Amates and San Jose, Guatemala). 



Rupornis magnirostris griseicauda Swann, Synopt. List Accip., 1919, 55, part; 

 Synop. Accip., 1922, 92, part; Monogr. Birds Prey, i, 1930, 440, part 

 (Guatemala). 



Rupornis magnirostris direptor Peters and Griscom, Proc. New England Zool. 

 Club, xi, 1929, 46 (orig. descr.; crit.; chars.; distr.). — GriscOiM, Bull. Amer. 

 Mus. Nat. Hist., Ixiv, 1932, 156 (distr.; Guatemala: Hacienda Carolina, 

 Hacienda California, Finca el Cipres, Ocos, Virginia Plantation near Puerto 

 Barrios); Ibis, 1935, 810, in text (Guatemala; Sierra de las Minas; spec). 



Buteo magnirostris direptor Peters, Check-list Birds of World, i, 1931, 237. — 

 Carriker and de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, Ixxxviii, 

 1935, 415 (Guatemala; Quirigua; spec). — van Tyne, Misc. Publ. Mus. Zool., 

 Univ. Michigan, No. 27, 1935, 16 (Pet^n, Guatemala; spec; meas.). — 

 Brodkorb, Occ Pap. Mus. Zool., Univ. Michigan, No. 425, 1940, 4 (specs.; 

 Chiapas, Guatemala, El Salvador, Honduras). 



BUTEO MAGNIROSTRIS ARGUTUS (Peters and Griscom) 



NiCARAGUAN InSECT HaWK 



Adult (sexes alike). — Similar to that of Buteo magnirostris direptor, 

 but paler above, the crown purer gray, clearly defined from the darker 

 grayish brown back; the breast more extensively washed with paler 

 grayish and the buflfy margins of the feathers less distinct; size smaller. 



Juvenal (sexes alike) . — Similar to that of Buteo magnirostris direptor, 

 but smaller. 



Natal dovm. — Not known. 



Ad.ult wa/e.— Wing 213-220 (216.2); tail 159.4-163.5 (161.1); 

 culmen from cere 17.4-18.1 (17.6); tarsus 61.5-68.7 (64.5); middle toe 

 without claw 28.5-32.4 (30.2 mm.) (5 specimens). 



Adult female.~Wmg 221-240 (232.5) ; tail 155.8-173 (162.9) ; culmen 

 from cere 18.7-20 (19.4); tarsus 62-68.4 (66.6); middle toe without 

 claw 32.5-34.7 (33.4 mm.) (8 specimens). 



Range. — Resident in Central America from eastern Honduras 

 (Omoa, Uliia Valley, Toloa Lagoon, Tela, Lancetilla, Truxillo, Euatan 

 and Bonacca Islands, Rio Segovia) south on the Caribbean slope 

 across Nicaragua (Cape Gracias a Dios, Rio Escondido, Ometepe 

 Island, San Emilio, Volcan de Chinandega, etc.) and Costa Rica 

 (Cerro Santa Maria, Tenorio, Azahar de Cartago, Turrialba, Tala- 

 manca, etc.) to the Chiriqui district of Panama (Almirante, Chan- 

 guinola, Chiriquicito, Cricamola), and from the Honduras-Nicaragua 

 boundary southward on the Pacific slope to northwestern Costa Rica 

 (San Jos6). 



Type oj locality. — Almirante, Panama. 



Asturina magnirostris (not Falco magnirostris Gmelin) Moore, Proc. Zool. Soc. 

 London, 1859, 52 (Omoa, Honduras).— Taylor, Ibis, 1860, 225 (Atlantic 



