Classification of the North American Snakes 



FAMILY 



COLUBRID.* 



(concluded) 



NORTH 

 AMERICAN SPECIES 



Species Terrestrial 



Burrowing 



Elapinae.... | Elaps. 



This sub- 

 family em- 

 braces the 

 Cobras and 

 their allies 

 in the Old 

 World, and 

 the Coral 

 S n a k e s in 

 the New 

 L World. 



f A ncistrodon 2 



i Terrestrial 



i Semi-aquatic 



Terrestrial 



Crotalinae . . < Sistrurus 2 ' 



A pair of (Crotalus n 



long fangs 



If o fd i n g 

 against roof 

 of mouth 

 when jaws 

 I. are closed. 



Total number of species : 1 1 1 . 



Explanatory: a. Signifies that the reptile leads a burrowing or sub- 

 subterraneous life. 



b. Terrestrial snakes are those species that prowl 

 above ground in search of their prey. 



c. Semi-aquatic reptiles are those that frequent the 

 borders of ponds and streams 



d. By the term secretive, we may signify those snakes 

 that are not often found prowling; they search 

 for their prey in stone-piles or under the loose 

 bark of decaying trees. 



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