60 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Baird, Rep. Pacific R. R. Surv., ix, 1858, 3, 7. — Ridgway, in Baird, 

 Brewer, and Ridgway, Hist. North Amer. Birds, iii, 1874, 103. — Garrod, 

 Proc. Zool. Soc. London, 1874, 117. — Sclater, Ibis, 1880, 404. — Barrows, 

 Stand. Nat. Hist., iv, 1884, 263, 273, in text. — Coues, Key North Amer. 

 Birds, ed. 2, 1884, 519. 



<CFalconidae Bonaparte, Consp. Gen. Av., i, 1850, 12 (excludes Aegypiinae). — 

 Kaup, in Jardine's Contr. Orn., 1850, 51 (excludes Aegypiinae). — Bona- 

 parte, Rev. Mag. Zool., vi, 1854, 531 (excludes Aegypiinae). — Carus, 

 Handb. Zool., i, 1868-75, 306 (excludes Aegypiinae). — Gray, Hand-list, 

 i, 1869, V, 4 (excludes Aegypiinae). — Sclater and Salvin, Nom. Av. 

 Neotr., 1873, vii, 118 (excludes Pandionidae and Aegypiinae). — Gurney, 

 List Diurn. Birds Prey, 1884, xiii, 10 (excludes Aegypiinae). — Gadow, in 

 Bronn's Thier-Reich, Vog., ii, 1891, 159, 300 (excludes Pandioninae and 

 Aegypiinae) ; Classif. Vertebr., 1898, 33 (excludes Aegypiinae). — Sharpe, 

 Rev. Rec. Att. Classif. Birds, 1891, 78 (excludes Pandioninae and Aegy- 

 piinae). — Salvin and Godman, Biol. Centr.-Amer., Aves, iii, 1899, 41 

 (excludes Pandioninae and Aegypiinae). — Swann, Synopt. List Accip., pt. 

 1, 1919, 7 (excludes Aegypiinae, Pandioninae, and genus Polioaetns!) . 



= Gypaetidae Huxley, Proc. Zool. Soc. London, 1867, 464. 



= Aetomorphae Carus, Handb. Zool., i, 1868-75, 305. 



= Falcones American Ornithologists' Union, Check-list, 1886, 154; ed. 3, 

 1910, 153; ed. 4, 1931, 62.— Wetmore, Proc. U. S. Nat. Mus., Ixxvi, 

 art. 24, 1930, 3.— Peters, Check-list Birds of World, i, 1931, 192.— 

 Wetmore, Smiths. Misc. Coll., Ixxxix, No. 13, 1934, 5; xcix, No. 4, 1940, 

 32; No. 7, 5. 



= Gypo-Falconidae Furbringer, Unters. Morph. Syst. Vog., ii, 1888, 1297, 

 1565, 1580. 



= Vulturidae + Falconidae Gadow, Classif. and Struct. Vertebr., 1898, 33. 

 XFalconidae Sharpe, Cat. Birds Brit. Mus., i, 1874, ix, 30 (includes Cariamae 

 and Sagittariidae!; excludes Pandionidae and Polioaetns!). 



•<Falcone3 Sharpe, Cat. Birds Brit. Mus., 1, 1874, ix, 1 (excludes Pandionidae 

 and Polioaetus). 



= Falconi Maynard, Birds Eastern North Amer., 1881, 294. 



Falconiform birds with the hallux incumbent and functional and 

 much more than half as long as fourth toe; tarsometatarsus greatly 

 flattened, with strong lateral ridges (the inner one produced and thin), 

 its posterior face, on proximal end, with two ridges separated by a 

 deep and wide groove; basipterygoid processes absent or rudimentary; 

 femorocaudal muscle present, accessory femorocaudal muscle absent, 

 the myological formula A-f-. Posterior, or ischioiliac, edge of os 

 innominatum without any notch; external nares imperforate; olfactory 

 chamber small; maxillopalatines spongy; hallux connected with the 

 flexor longus hallucis; lower larynx present, provided with two pairs 

 of intrinsic muscles; oil gland feathered; caeca present. 



Those characters common to the Accipitres and Cathartae are as 

 follows: Metasternum subtruncate; furcula entirely separated from 

 keel of sternum; clavicle not ankylosed with sternum; acrocoracoid 

 articulated with furcula. Besides the above the following characters, 

 though not strictly diagnostic of the group, may be mentioned: Palate 



