786 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



plagiatus, Buteo nitidus, 217, 359, 3G2, 



364, 365, 367. 

 plancus, Falco, 595, 598. 

 Polyborus, 598, 599. 

 Polyborus plancus, 598, 599. 

 Vultur, 598. 

 planiceps, Archibuteo, 211. 

 platypterus, Buteo, 308, 311, 318, 319, 

 321 336. 

 Buteo platypterus, 218, 219, 300, 



314, 318, ■" ' 323. 

 Sparvius, 3^^ ., 1. 

 subsp., Buteo, 316. 

 pleskei, Falco peregrinus, 666. 

 plumbea, Ictinia, 120, 125, 127, 129. 

 Ictinia (Poecilopteryx), 129, 

 Ictinia plumbea, 129. 

 Leucopternis, 377, 378, 385, 386. 

 Leucopternis schistacea, 386. 

 Urubitinga, 386. 

 plumbeus, Buteo, 129. 

 Clamosocircus, 564. 

 Climacocercus, 564. 

 Cymindes sociabilis, 138, 139. 

 Falco, 118, 125, 127. 

 Ictinia, 129. 

 Micrastur, 564. 

 Nertus, 129. 

 Rostrhamus, 138, 140. 

 Rostrhamus sociabilis, 131, 136, 

 137, 139, 140. 

 plumbiceps, Falco, 747, 753. 

 Plumipeda, 441. 

 plumipes, Buteo, 211. 

 Pnigohierax, 615. 



mexicanus, 630. 

 Poecilopternis, 211. 

 borealis, 245, 248. 

 lineatus, 286. 

 lucasanus, 254. 

 raontanus, 254. 

 oxypterus, 306. 

 pennsj'lvanicus, 311. 

 wilsoni, 316. 

 Poecilopteryx, 118. 

 Poecilornis, 614. 



dominicensis, 747. 

 leucophrys, 747. 

 sparverinus, 747. 

 sparverius, 737. 

 Poliborus, 595. 



tharus, 599. 

 Polihieracinae, 68, 544. 

 Polioaetus, 60, 523. 

 poliogaster, Falco, 573. 



Micrastur, 573. 

 Poliohierax, 612. 

 polionota, Asturina, 366. 

 Poliornis, 210. 

 polyagrus, Falco, 630, 668. 

 Falco lanarius, 631. 

 Falco (Hierofalco) lanarius, 631. 

 Falco mexicanus, 631. 

 Falco mexicanus polyagrus, 631. 

 Falco saker, 631. 

 Gennaia, 631. 



polyagrus, Hierofalco mexicanus, 631. 



Polyboreae, 579. 



Polvbori, 579. 



PolVborinae, 3, 63, 543, 544, 545, 578, 



579, 588, 596. 

 PolvVwroides, 63, 578, 579. 

 PolVborus, 3, 19, 544, 545, 549, 588, 

 595, 597. 



aquilinus, 587. 



auduboni, 605, 609. 



audubonii, 605, 609. 



brasiliensis, 598, 599, 603, 609. 



(Polyborus) brasiliensis, 598. 



brazilicnsis, 603. 



caracara, 599, 609. 



cheriway, 580, 598, 600, 604, 607. 



cheriway ammophilus, 607. 



cheriwaj^ auduboni, 606. 



cheriway audubonii, 597, 599, 600, 



606, 607, 609. 



cheriway cheriwav, 597, 599, 605, 



607, 60S. 



cheriway pallidus, 597, 599, 609. 



chimachima, 588, 590, 594. 



chimango, 589, 590. 



degener, 591. 



galapagoensis, 211, 274. 



hyperstictus, 590. 



lutosus, 580, 597, 599, 610, 611. 



ochrocephalus, 591. 



pallidus, 610. 



plancus, 598, 599. 



plancus brasiliensis, 599. 



plancus plancus, 598, 599. 



tharus, 598, 599, 603, 609. 



tharus auduboni, 605, 606, 609. 



tharus audubonii, 605, 609. 



tharus tharus, 599. 



tharus var., 598. 



vulgaris, 598, 599, 603, 609. 

 Pontaetos, 473. 

 Pontaetus, 473. 

 Pontoaetos, 473. 

 Pontoaetus, 473. 

 Potamolegus, 212. 



superciliaris, 212. 



superciliaris magniplumis, 212. 

 Praedo, 212. 

 princeps, Buteo, 388. 



Leucopternis, 377, 378, 387. 



Leucopternis princeps, 378, 387, 

 388. 



Morphnarchus, 388. 



Urubitinga, 388. 

 Procellariiformes, 6. 

 Psammoaetus, 453. 

 Pseudaetus, 210. 

 Pseudastur, 376. 

 Pseudocircus, 499. 

 Pseudogryphi, 4. 

 Pseudogryphus, 51. 



californianus, 58. 

 californicus, 59. 

 Pseudogryps, 51. 

 Pseudo-Vulturidae, 579. 

 Pteraetos, 452. 



