BIRDS OF NORTH AND MIDDLE AMERICA 591 



cc. Underparts of body heavily marked with dark brown. 



M. chimachima chimachima, juv. (extralimital) 

 66. Upper tail coverts buff to warm buff, 

 c. Underparts immaculate buff. 



Nom. Av. Neotr., 1873, 122, part (South America to Brazil); Proc. Zool. Soc. 

 London, 1879, 639 (Santa Cruz and Chiquitos, Bolivia); Ridgway, Proc. Boston 

 Soc. Nat. Hist., 1873, 50 (Brazil); U. S. Geol. and Georgr. Surv. Terr., Bull. 6, 

 ser. 2, 1876, 467, 468, part (Brazil; Paraguay; synonymy; range); Cabanis, Journ. 

 fur Orn., 1874, 230 (Brazil); Allen, Bull. Essex Inst., viii, 1876, 82 (Anjos, lower 

 Amazon); Bull. Amer. Mus. Nat. Hist., v, 1893, 148 (Chapada, Matto Grosso, 

 Brazil); Taczanowski, Orn. Perou, i, 1884, 99; Berlepsch, Journ. fiir Orn., 1887, 

 122 (Paraguay); Berlepsch and Ihering, Zeitschr. Orn., 1885, 172 (Taquara, Rio 

 Grande do Sul, s. Brazil); Riker, Auk, viii, 1891, 161 (Santarem, Brazil); Koen- 

 igswald, Journ. fiir Orn., 1896, 386 (Sao Paulo, s. Brazil); Holmberg, Segundo 

 Censo Argent., 1898, 504; Sharpe, Hand-list, i, 1899, 244, part (Brazil; Ama- 

 zonia); Salvadori, Boll. Mus. Zool. Torino, xv, 1900, 14 (Urucum, Matto Grosso, 

 Brazil); Goeldi, Ibis, 1903, 497 (Rio Capim, ne. Brazil); Ihering, Rev. Mus. 

 Paulista, vi, 1904, 337 (Paraguay); Hellmayr, Abh. Bayer. Akad. Wiss., Kl. II, 

 xxii, pt. 3, 1905 (1906), 570 (crit. as to Gymnops strigilahis Spix), 571 (crit. as to 

 Milvago ochrocephalus Spix); Nov. Zool., xxviii, 1921, 175 (crit.); Ihering and 

 Ihering, Av. Brazil, 1907, 84 (Rio Grande do Sul; Rio de Janeiro; Sao Paulo; 

 Bahia; Paril; Amazonia; Rio Negro; crit.); Hartert and Venturi, Nov. Zool., 

 xvi, 1909, 237, pi. 3, fig. 15 (Mocovi, Argentina; descr. nest and eggs); Reiser, 

 Denkw. Mat.-Nat. Wiss. Wien, 1910, 88 (Serra and Rio Grande, ne. Brazil); 

 Grant, Ibis, 1911, 334 (Puerto San Juan, Paraguay); Brabourne and Chubb, 

 Birds South Amer., i, 1912, 63, part (Uruguay; Paraguay; Brazil); Dabbene, 

 Bol. Soc. Physis. Buenos Aires, i, 1913, 298 (Mocovi, Campo, etc., Argentina); 

 Bertoni, Fauna Paraguaya, 1914, 42 (Puerto Bertoni). — Milvago chimachima 

 chimachima Swann, Synop. Accip., pt. 1, 1921, 15, part (Brazil; Amazonia); 

 Peters, Check-list Birds of World, i, 1931, 279.— Ibicter (Milvago) chimachima 

 Kaup, Mus. Senckenb., iii, Heft 3, 1845, 26. — Ibicter chiviachima Kaup, Isis, 

 1847, 354 (monogr.), 370, 375, 381; in Jardine's Contr. Orn., 1850, 79. — Ibycter 

 chimachima Sharpe, Cat. Birds Brit. Mus., i, 1874, 39, part (Bahia, Mexiana 

 Island, and Barra do Rio Negro, Brazil); Goeldi, Ibis, 1897, 161 (Amapd,, ne. 

 Brazil); Ihering, Rev. Mus. Paulista, iii, 1899, 343 (Ypiranga, Sao Paulo, s. 

 Brazil); iv, 1900, 91 (descr. nest and eggs), 162 (Cantogallo, Sao Paulo), 269 

 (measurements of eggs) ; Hagmann, Zool. Jahrb., 1907, 20 (Mexiana Island, 

 Brazil). — Falco crotophagus Maximilian, Reise nach Bras., i, 1820, 297 in text, 

 ii, 199 ("Caracara" . . . "oder degener")- — Falco degener Lichtenstein, Verz. 

 Doubl., 1823, 61 (Pard and Sao Paulo, Brazil; cites "Chirnachima Azara, 6"); 

 Maximilian, Beitr. Naturg. Bras., iii, pt. 1, 1830, 162 (Cabo Frio; Coral de Battuba; 

 Marica; Sagoarema; Ponta Negra; Ararauna). — Polyborus degener Vigors, Zool. 

 Journ., i, 1824, 336; Stephens, in Shaw's Gen. Zool., xiii, pt. 2, 1826, 11; xiv, 

 pt. 1, 1826, 346; Lesson, Man. d'Orn., i, 1828, 88. — Milvago ochrocephalus Spix, 

 Av. Bras., i, 1824, 12, pi. 5 (Capitania, Sao Paulo, s. Brazil) ; Gould, Zool. Voy. 

 Beagle, pt. 3, 1841, 13; Peale, Rep. U. S. Expl. Exped. (Wilkes), 1848, 61; Bur- 

 meister, Syst. "Obers. Th. Bras., ii, 1856, 36. — Polyborus ochrocephalus Jardine and 

 Selby, Illustr. Orn., 1827, pi. 2. — Haliaetus ochrocephalus Cuvier, Regne Anim., 

 i, 1829, 327. — Gymnops sirigilatus Spix, Av. Bras., i, 1824, 10, pi. iv a (Xingil, 

 Brazil); Stephens, in Shaw's Gen. Zool., xiv, pt. 1, 1826, 346.— Milvago 

 chimachima strigilata Swann, Synop. Accip., pt. 3, 1922. Err, et Add. (e.c. Brazil, 

 n. to Amazonia); Monogr. Birds Prey, i, 1925, 89 (monogr). 



