768 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Elanoidinae, 81. 

 Elanopterus, 68. 

 Elanus, 3, 61-65, 67-70, 76, 82. 



amauroleiicus, 357. 



axillaris leucurus, 74. 



axillaris majusculus, 76. 



caeruleiis, 70. 



caesius, 69. 



cucurus, 74. 



dispar, 72. 



furcatus, 89. 



glaucus, 74. 



leucurus, 72. 



leucurus leucurus, 70, 74. 



leucurus majusculus, 70, 71, 75. 



notatus, 70, 71. 



scriptus, 70, 71. 



swainsoni, 79. 



swainsonii, 79. 

 Elasas, 82. 



furcatus, 91. 

 elegans, Buteo, 286, 288, 290. 



Buteo lineatus, 219, 220, 286-289, 

 376. 



Paecilopternis, 289. 



Vultur, 14. 

 Entriorchis, 63. 

 Eocathartidae, 6. 

 equadorensis, Buteo, 351. 

 Erne, 452. 

 Erythospizia, 142. 

 Erythrocnema, 368. 



uncinata, 110, 374, 375. 

 erythrocnemis, Accipiter, 166, 204. 

 erythrofrons, Daedalion, 100, 108. 

 erythronemia, Accipiter, 166. 

 erythronemius, Accipiter, 149. 

 erythronotus, Buteo, 211, 234. 



Haliaetus, 234. 

 crythropus, Falco, 614. 

 Erythropus, 614. 

 Erythrospizias, 142. 

 Erythrotriorchis, 63, 140. 

 Ethiopicarum, 61. 

 Euaquila, 452. 

 Eucircus, 499. 

 Eufalco, 616. 

 Euharpages, 2. 

 Euhierax, 616. 

 EunisuSj 142. 

 europogistus. Circus, 505. 



Falco, 505. 

 excubitor, Herpetotheres cachinnans 



555. 

 exiguus, Buteo albicaudatus, 236. 



Tachytriorchis albicaudatus, 224. 

 exitiosus, Accipiter, 184. 



Accipiter superciliosus, 183. 

 extimus, Buteo lineatus, 219, 220, 292, 

 293. 

 Micrastur mirandollei, 561, 572, 574. 



Falco, 3, 544, 547, 548, 614, 617, 670. 

 aequinoctialis, 397. 

 aeruginosus, 498, 499. 

 aesalon, 615, 616, 709, 715. 



Falco aesalon caribaearum, 749. 



aesalon noveboracensis, 701. 



aesalon var., 749. 



aguia, 212. 



alaudarius, 722. 



(Tinnunculus) alaudarius alauda- 

 rius, 722. 



albescens, 145. 



albicans, 722. 



albicaudus, 481. 



albicilla, 472, 473, 477, 482, 489. 

 497. 



albicilla borealis, 478. 



albicularis petoensis, 680. 



albifrons, 357. 



albigularis, 616, 670, 674, 677. 



(Neofalco) albigularis, 672. 



albigularis albigularis, 617, 618, 

 674, 678. 



albigularis petrophilus, 618, 681. 



albigularis rufigularis, 679. 



albogularis, 678. 



albus, 641. 



americanus, 489, 530, 580, 584, 585. 



anatuin 656, 664. 



anatum anatum, 664. 



anthracinus, 278, 401, 404, 409. 



antillarum, 319, 748. 



apivorus, 81. 



aquilinus, 245, 587. 



architinnunculus, 722. 



arcticus, 646. 



ardearius, 666. 



arundiuaceus, 538. 



aterrimus, 582. 



atricapillus, 150, 437, 441. 



auduboni, 702. 



(Hypotriorchis) aurantiacus, 680. 



aurantius, 673, 677, 679, 685. 



(Hypotriorchis) aurantius, 677. 



australis, 546. 



badius, 722. 



barbarus germanicus, 618. 



biarmicus, 615, 621, 622. 



bidentatus, 114, 115, 117, 118. 



blancheti, 666. 



boenus, 546. 



borealis, 240, 247, 258, 261, 263, 

 266. 



brachvpterus, 559, 560, 561, 563, 571. 



brasiliensis, 599, 603, 609. 



brunneus, 722. 



busarellus, 415. 



buson, 210, 396. 



buteo, 211, 212, 220, 299, 641. 



butcoides, 286. 



buzarellus, 415. 



cachinnans, 550, 551, 554, 556. 



caerulescens, 141. 



calidus, 666. 



calquin, 436. 



canadensis, 458. 



candicans, 615, 643, 647. 



(Hierofalco) candicans, 644. 



candicans islandicus, 639. 



caracca, 436. 



