210 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



WAY, Bull. Mus. Comp. Zool., Ixxxviii, 1941, 112 (Lower Amazonia; Mexiana 

 Island; Marajo Island; Rio Xingu; Victoria; Santarem). 



Falco rutilans Lichtenstein, Verz. Doubl., 1823, 60 (Brazil; based on "Buse des 

 Savannes noyies rousse Azar. 11. Temm. et Lange. PI. col. 25"). — Temminck, 

 Planches Col., i, 1824, pi. 25 and text. — Maximilian, Beitr. Naturg. Bras., 

 i, 1830, 223 (Parahyba, St. Bento, Rio Barganza, Lagoa Feia, and Villa de 

 St. Salvador). 



Circus rutilans Stephens, in Shaw's Gen. Zool., xiii, pt. 2, 1826, 43 (South 

 America). 



Buteo rutilans Lesson, Man. Orn., i, 1828, 104; Traite d'Orn., 1831, 79.— d'Or- 

 BiGNY, Vo}'. Am6r. Merid., iv, pt. 3, 1839, 104, part (Paraguay; habits). — d'Or- 

 BiGNY and Lafresnaye, Synop. Avium, 1839, 6, part (Chiquitos and Moxos, 

 Bolivia).— PucherXn, Rev. Mag. Zool., 1850, 213 (crit.). — Hartlaub, 

 Journ. fur Orn., 1855, 419 (crit.). 



Hypomorphnus rutilans Tschudi, in Wiegmann's Arch, ftir Naturg., x, pt. 1, 

 1844, 264 (Peru); Fauna Peruana, Aves, 1844-46, 17, 84.— Cabanis, in 

 Schomburgk's Reis. Brit. Guiana, iii, 1848, 740. 



Asturina rutilans Burmeister, Syst. Ubers. Th. Bras., ii, 1856, 80. 



Aquila buson (not Falco buson Daudin, 1800) Spix, Av. Bras., i, 1824, 6 (Rio 

 Amazon). 



Subfamily Buteoninae: Round-winged Hawks and Eagles 



=Buteoninae Coues, Key North Amer. Birds, ed. 5, 1903, 678. — Hartert, 



Vog. pal. Fauna, ii, 1913, 1087. — Peters, Check-list Birds of World, i, 



1931, 227. 

 =Buteones Ridgway, Proc. Boston Soc. Nat. Hist., 1873, 63; Bull. U. S. GeoL 



Surv. Terr., ser. 2, No. 4, 1875, 4 {Leucopternis, Asturina, Kaupifalco, 



Poliornis, Rupornis, Buteo, and Geranoaetus). 

 <Milvinae Hartert, Vog. pal. Fauna, ii, 1913, 1087 (includes Milvus, Halias- 



tur, and Haliaetusl) 

 <Harpyidae Burmeister, Syst. Dbers, Th. Bras., ii, 1856, 57 {Thrasaetus, 



Morphnus, and Spizaetus). 

 <Aquilinae Sundevall, Ofv. Svensk. Vet.-Akad. Forh., No. 2, 1874, 35 



(Spizaetus, Lophaetus, Pseudaetus, and Aquila). 

 <Aquilae Ridgway, Proc. Boston Soc. Nat. Hist., xvi, 1873, 70 {Aquila, 



Spizaetus, Spiziastur, Morphnus, Thrasaetus, and Harpyhaliaelus) . 

 <Morphni Ridgway, Bull. U. S. Geol. and Geogr. Surv. Terr., ser. 2, Bull. 2, 



1876, 147 {Morphnus and Thrasaetus) . 

 <Thrasaetinae Pycraft, Proc. Zool. Soc. London, 1902, 315 {Morphnus and 



Thrasaetus) . 

 <Archibuteones Ridgway, Proc. Boston Soc. Nat. Hist., 1873, 72 {Archibuteo 



only). 



Coracoids not overlapping at sternum; nasal septum not completely 

 ossified; upper portion of anterior face of tarsometatarsus with no 

 bony ring; outer (fourth) toe not reversible; claws graduated in size 

 from that of the hallux (largest) to that of the outer (fourth) toe 

 (smallest), not contracted to their under surface; deep plantar tendons 

 of type III; tendons of biceps not split; tensores patagii not peculiar; 

 cervical verteberae 13 to 14; caeca minute; palate desmognathous; 

 sides of head densely feathered except around the eyes, which are 

 overhung by a bare superciliary plate of the lachi'ymal and have a 



