INDEX 



abbreviatus, Buteo, 126. 

 Aburria, 226. 

 Accipiter, 91, 126. 



cooperi, 9, 26, 91-92, 126; figure, 

 29; measurements, 93; explana- 

 tion of plate, 152. 

 nisus, 58. 



velox, 9, 91, 92, 126, 129 ; measure- 

 ments, 93 ; explanation of plate, 

 152. 



Accipitres, 5-168, 340; osteological 

 characters of , 12 7-33 ; of the United 

 States, osteology, synopsis of, 125- 

 27; relationships of, 133; explana- 

 tion of plates, 137-68. 



Accipitriformes, 126, 127. 



Accipitrinae, 126, 127, 129, 130. 



acuta, Dafila, 289, 291, 294, 299, 304. 



aegyptiaca, Chenalopex, 306. 



aesalon, Falco, 126. 



Aetomorphae, 7, 60. 



affinis, Marila, 272, 295. 



Aix, 249, 270, 284, 291, 300, 335. 

 sponsa, 249, 289, 294, 299, 304. 



albeola, Charitonetta, 295. 



albicaudatus sennetti, Buteo, 126. 



albicilla, Haliaetus, 10, 126. 



albifrons, Anser, see Anser albifrons. 



albiventris, Ortalis, 226. 



Alectoromorphae, 171. 



Alectoropodes, 171. 



Alectorornitb.es, 171. 



Allen, C. A., acknowledgments to, 

 198. 



Alopochen, 336. 

 americana, Mareca, 272. 



Marila, 295, 300. 



Oidemia, 290, 297. 

 americanus, Coccyzus, 346. 



Ibycter, 72, 114. 



Tympanuchus, 201-3. 

 Amphimorphae, 250. 

 Anas, 249, 270, 271, 284, 289, 294, 

 300 311, 312, 313, 335, 336. 



boschas, 304. 



clangula, 298. 



platyrhynchos, 270, 275, 304, 312. 



Anatidae, 249, 250, 251, 252, 253, 

 263- 275, 336, 338, 339, 340. 



Anatinae, 249, 250, 251, 252, 270-97, 

 308, 315, 338, 340; skeletal charac- 

 ters, 271-97. 



Anatoideae, 251. 



anatoides, Anser, 336. 



Andrews, cited, 336. 



Anhimidae, 252. 



Anhimoideae, 251. 



Anser, 249, 306, 307, 311, 315, 316, 

 318, 319, 320, 321, 322, 325, 327, 

 328, 329, 335, 336. 

 albifrons, 306, 308, 315, 316, 317, 

 320, 323, 324, 325, 326, 327, 328 



3 2 9- 33°- 



anatoide 336' 



condDni, 3 35. 



oeningensis, 336. 



scaldii, 336. 

 Anseranatidae, 251, 252. 

 Anseres, osteology and classification, 



249-344; grallatorial, 251; fossil, 



2 54» 335 -3 8; North American, 



classification of, 338-39; affinities 



of, 339-4o. 

 Anseridae, 251. 

 Anseriformes, 250, 252, 339. 

 Anserinae, 249, 250, 251, 252, 338; 



osteology of, 306-30 ; skull, 307-14; 



skeleton of the tongue, 314-15; 



trunk skeleton, 315-30. 

 anthracina, Urubitinga, 9, 96, 126. 

 Apteryges, 171. 

 Apterygidae, 171. 

 Apterygiform.es, 171. 

 Aquila, 126. 



chrysaetos, 10, 96-99, 126; figures, 

 97, 103; explanation of plates, 

 146, 166. 



fucosa, 75. 

 Aquilinae, 127. 

 Arboriphila charltoni, 233. 

 Archibuteo, 96, 126. 



ferrugineus, 9, 126. 



