Vni BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Order Falcoxiformes: Diurnal birds of prey — Continued 

 Suborder Falcones: True birds of prey — Continued 



Family Accipitridae — Continued Page 



Subfamily Milvinac: True kites 113 



Genus Ilarpagiis Vigors 114 



Key to the species and subspecies of Harpagus 115 



Harpagus bidcntatus fasciatus Lawrence 116 



Genus Iclinia Vieillot 118 



Key to the species of Iclinia 120 



Iclinia viisisippienais ( Wilson) 120 



Iclinia plumbea (Gmelin) 125 



Genus Roslrhamus Lesson 130 



Key to the subspecies of Roslrhamus sociabilis 131 



Roslrhamus sociabilis sociabilis (Vieillot) 131 



Roslrhamus sociabilis plumbeus Ridgwa}' 136 



Roslrhamus sociabilis major Nelson and Goldman 138 



Roslrhamus sociabilis levis Friedmann 139 



Subfamily Accipitrinae: Goshawks, bird hawks, and their allies. 140 



Genus Accipiler Brisson 141 



Key to the species and subspecies of Accipiler 144 



Accipiler genlilis alricapillus (Wilson) 150 



Accipiler genlilis laingi (Taverner) 162 



Accipiler bicolor hicolor (Vieillot) 163 



Accipiler bicolor fidens Bangs and Noble 166 



Accipiler cooperii (Bonaparte) 167 



Accipiler gundlachi Lawrence 180 



Accipiler superciliosus fontanieri Bonaparte 182 



Accipiler slrialus velox (Wilson) 184 



Accipiler slrialus sultoni van Rossem 195 



Accipiler slrialus perobscurus Snyder 197 



Accipiler slrialus slrialus Vieillot 198 



Accipiler slrialus fringilloides Vigors 200 



Accipiler slrialus venalor Wetmore 201 



Accipiler chionogasler chionogaster (Kaup) 202 



Genus Helerospizias Sharpe 204 



Key to the races of Helerospizias meridionalis 205 



Helerospizias meridionalis meridionalis (Latham) 205 



Subfamily Buteoninae: Round-winged hawks and eagles 210 



Genus Buleo Laceptide 211 



Key to the species and subspecies of Buleo 213 



Subgenus Brewsleria Maynard 224 



Buleo regalis (Gray) 226 



Subgenus Tachylriorchis Kaup 232 



Buleo albicaudatus hypospodius Gurney 232 



Subgenus Buleo Lac6pfede 236 



Buleo jamaicensis borealis (Gmelin) 237 



Buleo jamaicensis calurus Cassin 246 



Buleo jamaicensis fuerlesi Sutton and Van Tyne 255 



Buleo jamaicensis alascensis Grinnell 256 



Buleo jamaicensis kriderii Hoopes 257 



Buleo jamaicensis umbrinus Bangs 260 



Buleo jamaicensis soliludinis Barbour 261 



Buleo jamaicensis jamaicensis (Gmelin) 262 



