760 



BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



blancheti, Falco, 666. 

 boenus, Falco, 546. 

 boliviensis, Cymindis, 109. 

 borealis, Astur, 245. 



Buteo, 240, 247, 249, 257, 258, 260, 



2G1, 263. 

 Buteo (Buteo), 242. 

 Buteo (Poecilopternis), 261. 

 Buteo borealis, 242, 248. 

 Buteo jamaicensis, 222, 223, 236, 

 245, 248, 255, 257, 260, 264, 265. 

 Falco, 240, 247, 258, 261, 263, 266. 

 Falco albicilla, 478. 

 Haliaetus, 478. 

 Poecilopternis, 245, 248. 

 braccata, Harpyia, 452. 

 braccatus, Morphnus, 452. 



Spizaetus, 452. 

 Brachypternus, 559. 

 Brachypterus, 559. 

 brachypterus, Astur, 562, 563. 

 Circaetus, 563. 



Circaetus (Herpetotheres), 563. 

 Climacocercus, 563. 

 Falco, 559-561, 563, 571. 

 Micrastur, 563, 571. 

 Micrastur brachypterus, 563, 571. 

 Nisus, 563, 571. 

 Rhyncomegas, 141. 

 Rhynchomegus, 563. 

 Brachypteryx, 559. 

 brachyura, Asturina, 356. 



Buteola, 356, 358. 

 brachyurus, Astur, 356. 



Buteo, 211, 218, 308, 352, 355. 

 Buteo (Buteola), 353. 

 Buteola, 357. 

 brasiliensis, Catharista atrata, 30. 

 Catharista atratus, 30. 

 Catharista urubu, 30. 

 Cathartes, 30. 

 Cathartes atratus, 30. 

 Coragyps, 30. 

 Coragyps atratus, 30. 

 Diodon, 114. 

 Falco, 599, 603, 609. 

 Morphnus, 396. 

 Orubitinga, 408. 

 Polyborus, 598, 599, 603, 609. 

 Polyborus (Polyborus), 598. 

 Polvborus plancus, 599. 

 Uriibitinga, 396, 408. 

 Vultur, 36. 

 braziliensis, Polyborus, 603. 

 Brewsteria, 212, 213, 224. 

 brisson, Accipiter, 141. 

 brittanicus, Falco peregrinus, 618. 

 brooksi, Haliaeetus, 477. 



Haliaeetus albicilla, 481. 

 Haliaetus, 481. 

 Haliaetus albicilla, 481. 

 brunnescens, Buteo platypterus, 218, 



318, 319. 

 brunneus, Falco, 722. 

 Bucerotes, 4, 6. 

 Bucerotidae, 1, 524. 



buckleyi, Micrastur semitorquatus, 563. 



564, 568. 

 buflfoni. Circus, 595. 

 burroviana, Catharista, 38. 



Oenops, 38. 

 burrovianus, Cathartes, 38. 



Rhinogryphus, 38. 

 Busaetes, 212. 

 busarellus, Buteo, 415. 



Buteo (Ichthyoborus), 415 

 Buteogallus, 415. 

 Circus, 409, 415. 

 Falco, 415. 

 Ichthyoborus, 415. 

 Busarellus, 63, 67, 409. 

 nigricoUis, 411, 413. 

 nigricoUis australis, 413, 415. 

 nigricollis leucocephalus, 413. 

 nigricoUis macropus, 415. 

 nigricoUis nigricoUis, 410, 414 

 buson, Aquila, 210. 

 Falco, 210, 396. 

 Butaetes, 211-213, 224, 225, 324. 

 buteo, 212. 

 sancti-johannis, 329. 

 Butaetos, 211. 

 Butaquila, 211. 



leucocephala, 211. 

 strophiata, 212. 

 Butastur, 63. 

 buteo, Butaetes, 212. 

 Buteo, 220. 

 Buteo buteo, 220. 

 Cerchne, 212. 



Falco, 211, 212, 220, 299, 641. 

 Buteo, 63, 64, 67, 205, 210-213, 217, 

 236, 324, 377. 



abbreviatus, 277, 279, 358. 

 abbreviatus abbreviatus, 278, 279. 

 abbreviatus minima, 358. 

 (Asturina) aethiops, 306. 

 albicaudatus, 211, 213, 223, 233, 



234, 236, 306, 374. 

 (Craxirex) albicaudatus, 235. 

 (Tachytriorchis) albicaudatus, 232 

 albicaudatus albicaudatus, 223, 224. 

 albicaudatus colonus, 224, 233, 236. 

 albicaudatus exiguus, 236. 

 albicaudatus hypospodius, 224, 232, 



233, 235. 

 albicaudatus sennetti, 233, 236. 

 albifrons, 357. 

 albocaudatus, 235. 

 albonotatus, 213, 276, 277, 306, 358. 

 albonotatus abbreviatus, 220, 279. 

 albonotatus albonotatus, 220, 275, 



277, 279. 

 alleni, 292. 

 amcricanus, 245. 

 anthracinus, 402. 

 antillarum, 323. 

 aquilinus, 245. 

 ater, 336. 

 bairdi, 305. 

 bairdii, 305. 



