FALCON'ID.E— THE FALCONS. 



255 



The species of this genus are very numerons, especially within the tropics, 

 and are found all over the world, except in Australia. About thirty 

 nominal species are known, of which about fifteen distinct species, not 



Butco zonocercus (52763). 



Buteo sivainsoni (58505). 



including geographical races, belong to America. A single species, B. soli- 

 tarius {Pandion solitarius, Peale), (Gray's Hand List, I, 15, No. 136,) be- 

 longs to the Sandwich Islands. The genus seems to be wanting in the 

 Australian and East Indian regions. 



The following species and races belong to the North American fauna. 



