BIRDS OF NORTH AND MIDDLE AMERICA 393 



Realejo, San Emilio, Lake Nicaragua, Momotombo, San Carlos, and Rfo 

 Escondido, Nicaragua; San Jose, Aguacate, San Mateo, Pozo Azul de Pirris, 

 IVIiravalles, and Gulf of Nicoya, Costa Rica). — Miller, Bull. Amer. Mus. 

 Nat. Hist., xxi, 1905, 345 (Escuinapa, Sinaloa). — Phillips, Auk, xxviii, 1911, 

 73 (Altamira, Tamaulipas). — Griscom, Amer. Mus. Nov., No. 235, 1926, 12 

 (e. Quintana Roo, Yucatdn). — Swann, Monogr. Birds Prey, i, 1930, 455 

 (monogr.). 



Urubitinga zonura subspecies a. ridgwayi Gurney, List Diurn. Birds Prey, 1884, 

 77 (no descr., but refers to Appendix I, where discussed in detail; no type 

 locality designated, but cites only Lawrence and Sumichrast, U. S. Nat. 

 Mus. Bull. 4, 1875, 42). 



Urubitinga zonura ridgwayi Zeled6n, Proc. U. S. Nat. Mus., viii, 1885, 112 

 (Costa Rica). — Richmond, Proc. U. S. Nat. Mus., xvi, 1893, 531 (San Carlos 

 and Rio Escondido, Nicaragua). 



Urubitinga urubitinga ridgwayi Zeled6n, Anal. Mus. Nac. Costa Rica, i, 1887, 

 126 (San Jose; San Mateo). — Cherrie, Auk, ix, 1892, 328 (San Jos6, Costa 

 Rica); Expl. Zool. Merid. Costa Rica, 1893, 51 (Punta Mala, Delta del 

 Diqufs, and Laguna del Sierpe, sw. Costa Rica). — Carriker, Ann. Carnegie 

 Mus., vi, 1910, 461 (La Vijagua, Cerro de Santa Marfa, El General de Terraba, 

 Gudcimo, El Hogar, and Bebedero, Costa Rica). — Swann, Synopt. List 

 Accip., pt. 2, 1919, 58; Synop. Accip., ed. 2, 1922, 97 (Mexico to Costa 

 Rica).— Bangs and Peters, Bull. Mus. Comp. Zool., Ixviii, 1928, 388 

 (Chivela, Oaxaca, Mex.). — Peters, Bull. Mus. Comp. Zool., Ixxi, 1931, 310 

 (Almirante, Panama). — Griscom, Bull. Amer. Mus. Nat. Hist., Ixiv, 1932, 

 157 (distr.; Guatemala). — Stone, Proc. Acad. Nat. Sci. Philadelphia, 

 Ixxxiv, 1932, 300 (Honduras; Segovia River). 



Morphnus ridgwayi Hellmayr, Nov. Zool., xxviii, 1921, 177 (crit.). — Todd and 

 Carriker, Ann. Carnegie Mus., xiv, 1922, 152, in text (crit.; considers it 

 specifically distinct from M. urubitiiiga) . 



Hypomorphnus urubitinga ridgwayi Peters, Check-list Birds of World, i, 1931, 

 249.— Griscom, Bull. Mus. Comp. Zool., Ixxviii, 1935, 300 (Panama: Cerro 

 Flores, Chiriquf, Canal Zone). — van Tyne, Misc. Publ. Mus. Zool. Univ. 

 Michigan, No. 27, 1935, 16 (Uaxactun, Pet6n, Guatemala; spec). — van 

 RossEM, Birds El Salvador, 1938, 120 (localities in El Salvador; plumage; 

 colors of soft parts; habits); Occ. Pap. Mus. Zool. Louisiana State Univ., 

 No. 21, 1945, 58 (Sonora; status uncertain; spec.).— Traylor, Publ. Field 

 Mus. Nat. Hist., zool. ser., xxiv, 1941, 203 (Pacaitun, Campeche; spec). — 

 Sutton, Auk, lix, 1942, 108, in text (TamauHpas; correction). — Sutton and 

 Pettingill, Auk, lix, 1942, 9 (G6mez Farias region; sw. TamauHpas; 

 spec). — Brodkorb, Misc. Publ. Mus. Zool. Univ. Michigan, No. 56, 1943, 28 

 Mexico; Campeche; El Vapor; spec). 



Urubitinga urubitinga Stone, Proc Acad. Nat. Sci. Pliiladelphia, 1918, 249 

 (Panama; Canal Zone). 



ButeogaUus anthracinus anihracinus Sutton and Burleigh, Occ Pap. Mus. 

 Zool. Louisiana State Univ., No. 3, 1939, 26 (ne. Mexico; spec, from Victoria 

 and G6mez Farias, TamauHpas). 



HYPOMORPHNUS URUBITINGA URUBITINGA (GmeJin) 



Brazilian Urubitinga 



Adult (sexes alike). — Similar to that of Hypomorphnus urubitinga 

 ridgwayi, but with the tail white with only one broad, subterminal, 

 black band, and with the under wing coverts and the tibiae without 



