Section 1 

 NORTH AMERICA 



Definition of the Region: 



Confinento/ United Sfafes 



and Canada 



TABLE OF CONTENTS 



Page 

 Distribution Chart 3G 



Introduction 37 



Key to Genera o7 



ELAPIDAE: 



M/cruioides 38 



Micnirus 38 



CROTALIDAE: 



^4 (jkifitrodon 38 



Rattlesnakes 39 



Crotahis 40 



. Sisfrurus 43 



References 45 



35 



