120 



THE GUIDE TO NATURE 



The Spiny Swift. 



BY DR. R. W- SHUFEXDT, WASHINGTON, D.C. 



There is no group of our American 

 reptiles more difficult to study than are 

 the spiny swifts of the genus Sceloporus. 



Some fourteen or fifteen different species 

 of them have been recognized, and they 

 are distributed almost over the entire 

 country, various forms being peculiar to 



certain regions or districts. 



Throughout 



THE SPINY SWIFT. 



