FALCOXID/E - THE FALCONS. 



255 



Tlie species of this genus are very numerous, espeeiall}' within the tropics, 

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

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



Viilfn zonocercus (52763). 



Buleo swainsoni (68606). 



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

 farins {Fandion solitarius, Teale), (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. 



