BIRDS OF NORTH AND MIDDLE AMERICA 587 



Barbour, Bull. Mus. Comp. Zool., Ixv, 1922, 194 (Jcsusito, Dari^n; habits). — 

 Chapman, Bull. Amer. Mus. Nat. Hist., Iv, 1926, 220 (Esmeraldas, Pato de 

 Pajaro, Rio de Oro, Rio Suno, below San Jos6; Ecuador). — Griscom, Bull. 

 Mus. Comp. Zool., Ixix, 1929, 157 (Cana, Dari6n, Panama); Ixxii, 1932, 318 

 (Obaldia, Ranchon, Panama). — Hellmayr, Publ. Field Mus., zool. ser., 

 xii, No. 18, 1929, 453 (Maranhao, Brazil; crit.). — Naumbtjrg, Bull. Amer. 

 Mus. Nat. Hist., Ix, 1930, 103 (Matto Grosso, Brazil; many localities; crit.). 



Daptrius americanus aniericanus Peters, Bull. Mus. Comp. Zool., Ixxi, 1931, 308 

 (Almirante, Panama); Proc. Biol. Soc. Washington, xliv, 1931, 25; Check- 

 list Birds of World, i, 1931, 279.— Aldrich, Sci. Publ. Cleveland Mus. Nat. 

 Hist., vii, 1937, 50, in text.— Pinto, Rev. Mus. Paulista, xxii, 1938, 87 

 (Brazil; distr.). — Dug and, Rev. Acad. Colomb., iii, 1940, 220 (Magadalena, 

 Colombia).— Griscom and Greenway, Bull. Mus. Comp. Zool., Ixxxviii, 

 1941, 116 (Lower Amazonia; Obidos; Santar6m; spec). — Gyldenstolpe, 

 Kungl. Svenska Vet.-Akad. Handl., xxii. No. 3, 1945, 37 (Rio Jurud, w, 

 Brazil; spec; meas.; crit.). 



Da-pirion americanus americanus Griscom, Bull. Mus. Comp. Zool., Ixxviii, 1935, 

 302 (extreme e. Panama). 



Falco aquilinus Gmelin, Syst. Nat., i, pt. 1, 1788, 280 (South America; based on 

 Petit Aigle d'Amerique Buffon, Ois., i, 142; PI. Enl., pi. 417; etc.).— Tem- 

 MiNCK, Tabl. Meth., 1836, 2. 



Circaetus aquilinus Cuvier, Regne Anim., i, 1817, 317. 



Ibycier aquilinus Vigors, Zool. Journ., i, 1824, 336. — Stephens, in Shaw's Gen. 

 Zool., xiii, pt. 2, 1826, 10. — Cabanis, in Schomburgk's Reis. Brit. Guiana, 

 iii, 1848, 742. — Bonaparte, Consp. Gen. Av., i, 1850, 12; Rev. Mag. Zool., 

 vi, 1854, 539.— Cassin, Proc Acad. Nat. Sci. Philadelphia, xii, 1860, 133 

 (Turbo and Rio Truando, Colombia; habits; voice). 



Ibicter (Ibicter) aquilinus Kaup, Mus. Senckenb., iii. Heft 3, 1845, 262 (South 

 America) . 



Ibicter aquilinus Kaup, Isis, 1847, 358 (monogr.), 370, 374, 381; in Jardine's 

 Contr. Orn., 1850, 80. 



Gymnops aquilinus Spix, Av. Bras., i, 1824, 11 (Province of Piauhy, Brazil). 



Polyborus aquilinus Lesson, Man. d'Orn., i, 1828, 88. 



Falco formosus Latham, Index Orn., i, 1790, 38 (South America; based on Falco 

 aquilinus Gmelin; Petit Aigle d' A^mtrique Buffon, i, 1842; Red-throated Falcon 

 Latham, Synopsis, i, 97, etc.). — Shaw, Gen. Zool., vii, pt. 1, 1809, 159. 



Ibycter formosus Pelzeln, Verh, Zool.-bot. Ges. Wien, 1862, 134; Orn. Bras., 

 Abth. 1, 1868, 2; Abth. 4, 1870, 392; Ibis, 1873, 106 (note on probable type).— 

 Sclater and Salvin, Nom. Av. Neotr., 1873, 122. 



Falco nudicollis Daudin, Traite d'Orn., ii, 1800, 79 (Guiana; Trinidad), 177 

 (Cayenne; Guiana). — Maximilian, Beitr. Naturg. Bras., iii, pt. 1, 1830, 

 153 (Rio Ilheos and Rio Pardo, Brazil). 



Milvago nudicollis Burmeister, Syst. tjbers. Th. Bras., ii, 1856, 37. 



Ibycter leucogaster Vieillot, Nouv. Diet. Hist. Nat., xxix, 1819, 9 (Cayenne; 

 cites Falco formosus Latham, Falco aquilinus "Linn." = Gmelin, and PI. Enl., 

 427; Gal. Ois., 1825, pi. 6).— Lesson, Traite d'Orn., 1831, 33. 



(?) Ibycter gymnocephalus d'Orbigny and Lafresnaye, Synop. Avium, 1838, 

 2 (Cochabamba, Bolivia). — d'Orbigny, Voy. Am6r. Merid., iv, pt. 3, 1839, 

 50 (Cochabamba, Bolivia; PJo Securi, Province of Moxos, Bolivia). — 

 Strickland, Orn. Syn., i, 1855, 24.— Gray, Hand-list, i, 1869, 5, No. 36.— 

 Sharpe, Cat. Birds Brit. Mus., i, 1874, 34, footnote. — Hellmayr, Nov. 

 Zool., xxviii, 1921, 174 (crit.; thinks it probably Daptrius ater). 



(?) Daptrius gymnocephalus ? Gukney, List Diurn. Birds Prey, 1884, 13. 



