778 



BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



hyperstictus, Polyborus, 590. 

 hypoleucus, Haliaeetus, 484, 498. 



Haliaetus, 497, 498. 



Haliaetus albicilla, 498. 

 Hypomorphinus, 388. 

 Hypomorphnus, 67, 388, 390, 396, 415. 



anthrncinus, 396, 402. 



gundlachi, 404, 408. 



gundlachii, 408. 



meridionalis, 208. 



rutilans, 210. 



urubitinga, 389, 394. 



urubitinga azarae, 390. 



urubitinga ridgwayi, 390, 393, 394. 



urubitinga urubitinga, 390, 393, 

 394. 

 Hypomorphus, 388. 

 hypospodius, Buteo, 235. 



Buteo albicaudatus, 224, 232, 233, 

 235. 

 Hypotriorchis, 614. 



albigularis, 679. 



auranticulus, 680. 



aurantius, 673, 677, 685. 



columbarius, 701, 707, 712. 



deiroleucus, 674. 



femoralis, 685, 688. 



ferrugineus, 753. 



fusco-caerulcscens, 686, 689. 



fusco-caeruleus, 690. 



fusco-coerulescens, 689. 



melanogyne, 674, 680. 



ophryophanes, 680. 



richardsonii, 709. 



rufigularis, 674, 679, 681. 

 Hyptiopus, 81. 

 Hyptyopus, 81. 



Ibicter, 580. 



americanus, 584, 586. 



aquilinus, 587. 



(Ibicter) aquilinus, 587. 



ater, 582. 



(Daptrius) ater, 582. 



aterrimus, 582. 



chimachima, 591, 595. 



(Milvago) chimachima, 591. 



chimango, 589, 590. 



(Milvago) chimango, 589. 



leucop3'gus, 135. 



sociabile, 135. 

 Ibycter, 580, 588. 



americanus, 584, 585. 



americanus americanus, 585, 586. 



americanus guatemalensis, 584. 



americanus guatimalensLs, 584. 



aquilinus, 587. 



ater, 581. 



chimachima, 591. 



fasciatus, 582. 



formosus, 587. 



gymnocephalus, 587. 



leucogaster, 587. 

 Ichnosceles, 516. 

 Ichnoscelis, 516. 

 Ichnoschelis, 516. 



Ichthyagtus, 525. 



piscivorus, 525. 

 Ichthyiaetus, 525. 

 Ichthyoborus, 409. 



busarellus, 415. 



nigricollis, 413. 

 Icthyoborus, 409. 

 Ictinea, 118. 

 Ictinia, 63, 64, 67, 68, 113, 118, 120, 612. 



misisippiensis, 120, 121, 124. 



misisppiensis, 125. 



mississippiensis, 122, 125, 127. 



(Ictinia) mississippiensis, 124. 



mississippinensis, 125. 



ophiophaga, 125. 



plumbea, 120, 125, 127, 129. 



(Poecilopteryx) plumbea, 129. 



plumbea misisippiensis, 125. 



plumbea plumbea, 129. 



plumbea vagans, 129. 



plumbeus, 129. 



subcaerulea, 125. 



subcoerulea, 125. 

 Ictiniae, 113. 

 Ictininae, 113. 

 leracidea, 579. 

 leraspizia, 142. 

 lerax, 141. 



fringillarius, 141. 

 lerospizia, 142. 



immanis, Chondrohierax uncinatus, 102. 

 imperator, Falco, 472. 

 imperialis, Aquila, 452. 



Falco, 436. 



Harpyia, 436. 

 indicus, Lophotes, 81. 

 insidiatrix, Buteo magnirostris, 214, 350, 

 351. 



Rupornis magnirostris, 351. 

 insignata, Butcola, 305. 

 insignatus, Buteo, 305. 



Buteo swainsoni, 305. 

 insularis, Cathartes aura, 38. 

 insulicola, Buteo platypterus, 218, 219, 



319, 321. 

 intercedens, Cerchneis, 722. 

 intermixtTis, Falco, 701. 

 interstes, Clamosocircus guerilla, 578. 



Climacocercus guerilla, 578. 



Micrastur, 578. 



Micrastur guerilla, 578. 



Micrastur ruficollis, 566, 577, 578. 

 interstinctus, Falco, 722. 

 iota, Catharista, 30. 



Cathartes, 30, 34. 



Vultur, 34. 

 iowensis, Buteo platypyterus, 317. 

 Iribu, 29. 

 isabellinus, Falco, 740, 752. 



Falco sparverius, 741, 752. 



Falco (Tinnunculus) sparverius, 

 739-741. 



Tinnunculus, 753. 



Tinnunculus sparverius, 739, 740. 

 Ischnoceles, 516. 



niger, 520. 



