780 



BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



leucocephalus, Aquila, 490. 



Busarellus nigricollis, 413. 



Circus, 413, 4 L5. 



Falco, 481, 485, 490, 494. 



Halaetus, 493. 



Haliaeetus, 474, 475, 477, 485, 491. 



Haliaeetus leucocephalus, 474, 483, 

 487, 489, 493. 



Haliaetos, 487, 493. 



Haliaetus, 481, 486, 490, 493. 



Haliaetus (Haliaetus), 487. 



Haliaetus leucocephalus, 489, 494. 



Halieaetus, 493. 



Halioetus, 491. 



Vultur, 485, 490. 

 leucogaster, Falco, 472. 



Ibycter, 587. 

 leucogenys, Falco, 666. 



Falco peregrinus, 666. 

 leucomelas, Circaetus (Herpetotheres) , 

 563. 



Falco, 563. 

 leucophrys, Cerchneis, 747. 



Falco, 747. 



Falco (Tinnunculus), 747, 753. 



Poecilornis, 747. 



Tinnunculus, 747, 753. 

 leucops, Buteo, 274. 

 Leucopterius, 376. 

 Leucopternis, 63, 67, 210, 376, 378. 



albicollis costaricensis, 378, 379, 

 381 382 



albicollis gliiesbreghti, 378, 379, 381, 

 383. 



gheisbrechti, 383. 



ghiesbrechti, 381, 383. 



ghiesbrechti costaricensis, 381. 



ghiesbrechti ghiesbrechti, 383. 



ghiesbreghti, 377, 378, 381-383. 



ghiesbreghti costaricensis, 381. 



ghiesbreghti ghiesbreghti, 383. 



harlani, 249, 271. 



lacernulata, 377, 378. 



melanops, 377. 



plumbea, 377, 378, 385, 386. 



princeps, 377, 378, 387. 



princeps princeps, 378, 387, 388. 



schistacea, 377, 386. 



schistacea plumbea, 386. 



semiplumbea, 377-379, 383, 385. 



semiplumbeus, 384. 

 Leucopternus, 376. 

 leucopterus, Falco, 472. 

 leucopygus, Cymindes, 130, 135, 137, 

 140. 



Ibicter, 135. 



Rosthramus, 136, 137, 140. 



Rostrhamus, 135. 

 leucorrhous, Falco, 212. 

 leucor5'^pha, Aquila, 472. 

 Leucospiza, 142. 

 Leucospizias, 142. 

 leucurus, Buteo, 211. 

 Elanus, 72. 

 Elanus axillaris, 74 

 Elanus leucurus, 70, 74. 



leucurus, Milvus, 70. 

 leuphotes, Falco, 81. 

 leverianus, Astur, 245. 



Buteo, 245. 



Falco, 245, 538. 

 levis, Rostrhamus sociabilis, 131, 139, 



140. 

 Limnaetops, 442. 



cirrhatus cirrhatus, 442. 

 Limnaetus, 211, 442. 

 limnaetus, Falco, 442. 

 Limnosalis, 211. 



lineatus, Buteo, 213, 219, 282, 287, 290, 

 291, 293. 



Buteo (Buteo), 284. 



Buteo elegans, 289. 



Buteo lineatus, 219, 220, 280, 284, 

 287, 289, 290, 291. 



Falco, 282, 287, 290, 291, 310. 



Poecilopternis, 286. 

 Lithofalco, 616. 

 livens, Geranospiza niger, 523. 



Geranospiza nigra, 518, 523. 



Geranospizia caerulescens, 523. 

 longicauda, Astur, 81. 



Falco, 81. 

 longicaudus, Tinnunculus alaudarius, 



722. 

 longipes, Buteo, 211. 



Urubitinga, 396. 

 Lophaetus, 63, 210. 

 Lophoictiuia, 63. 

 Lophospiza, 142. 

 Lophospizia, 142. 

 Lophospizias, 142. 

 lophotes, Falco, 81. 

 Lophotes, 81. 



indicus, 81. 



reinwardi, 81. 

 Lophotriorchis, 63. 

 loquacula, Cerchneis sparveria, 750. 



Falco sparverius, 750. 

 loquaculus, Falco sparverius, 750. 

 lucasanus, Buteo, 254. 



Buteo borealis, 254. 



Poecilopternis, 254. 

 lunulatus, Falco, 666. 

 lutosus, Caracara, 611. 



Polyborus, 580, 597, 599, 610, 611. 



Macagua, 550. 



cachinnans, 551, 558. 



melanops, 160. 

 Alachaerirhamphus, 63. 



alcinus, 68. 

 macropterus, Circus, 499. 

 macropus, Busarellus nigricollis, 415. 

 macrourus, Accipiter, 499. 

 macrurus, Haliaeetus, 472. 



Haliaeetus pelagicus, 472. 



Thalassaetus, 472. 

 maculatus, Falco, 452, 653. 



Falco islandus, 645. 

 maculosa, Aquila, 499. 

 maestus, Herpetotheres cachinnans, 558. 



