126 



NEW YORK STATE MUSEUM 



majority of the species of the accipitrine forms, and we are in a 

 position to present some observations upon the way these birds are 

 probably related to each other, in so far as this system of their 

 anatomy seems to indicate. 



I am inclined to the following arrangement, as a provisional one. 



SUPERSUBORDER ACCTPITRIFORMES 



(United States) 



SUBORDER SUPERFAMILIES FAMILIES SUBFAMILIES GENERA 



fi Elanoides. . . 

 3 KKSS::::: 



t 4 Rostrhamus. 

 f i Circinae i Circus 



i Accipiter. . . 



Accipitres 



i Falconoidea . . 2 Falconidae 



2 Accipitrinae. 



3 Buteoninae . . 



4 Falconinae 



2 Astur 



1 Parabuteo. 



2 Buteo. 



3 Urubitinga , 



4 Asturina. . 



5 Archibuteo. 



6 Aquila .... 



7 Thrasae'tos. 



8 Haliaetus. 



1 Falco. 



5 Polyborinae.. 1 Polyborus. . 



3 Pandionidae 1 Pandion ... 



f 1 Gymnogyps 



2 Cathartoidea 4 Cathartidae J 2 Cathartes... 



I 3 Catharista. . 



SPECIES AND 

 SUBSPECIES 

 E. forficatus 



E. leucurus 



I. mississippiensis 

 R. sociabilis 

 C. hudsonius 

 A. velox 

 A. cooperii 

 A. atricapillus 



A. a. striatulus 

 P. u. harrisi 



B. borealis 

 B. b. kriderii 

 B. b. calurus 

 B. b. lucasanus 

 B. b. harlani 

 B. lineatus . 



B. 1. alleni 

 B. 1. elegans 

 B. abbreviatus 

 B. albicaudatus 

 . sennetti 

 B. swainsoni 

 B. platypterus 



B. brachyurus 

 U. anthracina 

 A. plagiata 



[A. L sancti-johan- 

 \ nis 



[ A. ferrugineus 

 A. chrysae'tos 

 T. harpyia 



I H. albicilla 



{ H. leucocephalus 



I, H. 1. alascanus 



' F. islandus 



F. rusticolus 

 F. r. gyrfalco 

 F. r. obsoletus 

 F. mexicanus 

 F. peregrinus 

 F. p. anatum 

 F. p. pealei 



F. aesalon 

 F. columbarius 

 F. c. suckleyi 

 F. c. richardsoni 

 F. fusco-coerules- 



cens 

 F. tinnunculus 

 F. sparverius 

 F. s. phalaena 

 F. s. peninsularis 

 F. dominicensis 



F. paulus 

 P. cheriway 

 P. lutosus 



P. h. carolinensis 



G. californianus 



C. a. septentriona- 

 lis 



C urubu 



This arrangement take: 



the United States, 

 Yulturidae. 



thus omitting 



into consideration only the Accipitres of 

 the families Serpentariidae and 



