582 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



DAPTBIUS AMERICANUS GUATEMALENSIS (Swann) 



Central American Carrion Falcon 



Adult (sexes alike). — Forehead, crown, occiput, nape, entire upper 

 parts of body and wings, remigcs, tail feathers, lower throat, breast, 

 upper abdomen, sides of upper abdomen, and under wing coverts 

 black with a dull steel greenish bluish sheen, the scapulars, inner- 

 most secondaries and the feathers of the back, rump, and upper tail 

 coverts and the outer webs of the lateral rectrices with indistinct, 

 narrow, transverse flutings; lores, circumorbital area, chin, and upper 

 throat bare; cheeks and auriculars blackish streaked with grayish 

 white; lower abdomen, thighs, flanks, and under tail coverts white, 

 sometimes tinged with pale creamy buff; bare skin of circumorbital 



Sclater and Salvin, Proc. Zool. See. London, 1866, 198 (upper Rfo Ucayali, e* 

 Peru); Nom. Av. Neotr., 1873, 122; Proc. Zool. Soc. London, 1875, 301 (upper 

 Rfo Ucayali and Pebas, e. Peru); Pelzeln, Orn. Bras., Abth. 1, 1868, 2; Abth. 4, 

 1870, 392; Sharpe, Cat. Birds Brit. Mus., 1, 1874, 35 (Peru); Taczanowski, Orn. 

 P^rou, i, 1884, 103; Allen, Ball. Amer. Mus. Nat. Hist., ii, 1889, 105 (lower Rio 

 Beni, Bolivia); Loat, Ibis, 1898, 563 (Brit. Guiana); Berlepsch and Hartert, Nov. 

 Zool., ix, 1902, 111 (Temblador and Nicare, Venezuela; fresh colors of unfeathered 

 parts); Berlepsch, Nov. Zool., ix, 1902, 111 (Orinoco Valley, Venezuela); Nov. 

 Zool., XV, 1908, 289 (Cayenne); Hellmayr, Abh. Bayer Akad. Wiss., Kl. II, 

 xxii, pt. 3, 1905 (1906), 570 (crit. on Gymnops fasciatus Spix), 571 (crit. on Gymnops 

 aterrimas Spix); Nov. Zool., xiv, 1907, 405 (Bora, Rio Madeira, Brazil); xvii, 1910, 

 409 (Calama, Brazil); Ihering and Ihering, Aves Brazil, 1907, 83 (Matto Grosso; 

 Rio Negro; Rfo Jurud,; Amazonia; Par^; Rio Grande do Sul; crit.; descr. young); 

 Snethlage, Journ. fiir Orn., 1908, 22 (Rfo Purus, w. Brazil); Brabourne and 

 Chubb, Birds South Amer,, i, 1912, 62 (Ecuador; Colombia; Venezuela; Guiana; 

 e. Brazil); Chubb, Birds Brit. Guiana, i, 1916, 215 (habits); Cherrie, Brooklyn 

 Inst. Sci. Bull., 11, 1916, 341 (Guanoco, Orinoco delta); Swann, Synopt. List 

 Accip., pt. 1, 1919, 8; Synop. Accip., pt. 1, 1921, 13; Monogr. Birds Prey, i, 1925, 75 

 (monogr.); Delacour, Ibis, 1923, 144 (Guarico and Apure, Venezuela). — Ibicter 

 atcr Schlegel, Mus. Pays-Bas, ii, No. 9, livr. 2, 1863, 7 (monogr); No. 36, livr. 

 10, 1873, 137.— Ibicter (Dapirius) ater Kaup, Mus. Senckenb., iii. Heft 3, 

 1845, 262. — Ibycier (Daptrius) ater Ridgway, Proc. Boston Soc. Nat. Hist., xvi, 

 1873, 51; U. S. Geol. and Geogr. Surv. Terr., ser. 2, Bull. 6, 1870, 472 (monogr.).— 

 Falco aierrimus Temminck, Planches Col., i, 1823, pis. 37, 342, and text. — 

 Gymnops aierrimus Spix, Av. Bras., i, 1824, 11 (Rio Amazon, Brazil). — Circaetus 

 aterrimus Cuvier, Regne Anim., i, 1828, 338. — Daptrius aterrimus Lesson, Man. 

 d'Orn., i, 1828, 7b.— Ibicter aierrimus Kaup, Isis, 1847, 353 (monogr.), 370, 381; in 

 Jardine's Contr. Orn., 1850, 79. — Milvago aterrimus Burmeister, Syst. 

 Ubers. Th. Bras., ii, 1856, 39,— (?) Gymnops fasciatus Spix, Av. Bras., i, 1824, 

 10, pi. 4 (Rio Jurud, Brazil). — Gymnops fasciatus Stephens, Shaw's Gen. Zool., 

 xiv, pt, 1, 1820, 346. — (?) Circaetus fasciatus Cuvier, Regne Anim., i, 1828, 

 338. — (?) Pandion fasciatus Gray, in Griffith's ed. Cuvier, Birds, i, 1829, 41. — (?) 

 Caracara fasciata Lesson, Trait6 d'Orn., 1831, 35. — (?) Ibycter fasciatus 

 Strickland, Orn. Syn., i, 1855, 33; Sharpe, Cat. Birds Brit. Mus., i, 1874, 34, 

 footnote (Rio JuruA, Brazil). — (?) Ibycter fasciatus Gray, Handlist i, 1869, 5, 

 No. 28. — Pandion strigilatus (not Gymnops strigilatus Spix) Gray, in Griffith's 

 ed. Cuvier, Birds, i, 1829, 42. 



