CONTENTS. 



Page 



Preface v 



Introduction vii 



Explanation of Terms used vii 



Synopsis op Families and Genera, and Systematic Index op 

 Species of North American Serpents ix 



Genus Crotalus 1 



— Crotalophorus 11 



— Agkistrodon 17 



— ToxicoPHis 19 



— Elaps 21 



— Eutainia 24 



— Nerodia 88 



— Regina 45 



— Ninia 49 



— Heterodon 51 



PiTUOPHlS 64 



— Scotophis 78 



— Ophibolus 82 



— Georgia 92 



— Bascanion 93 



— Masticophis 98 



— Salvadora 104 



— Leptophis 106 



— Chlorosoma 108 



— CONTIA 110 



DiADOPHIS 112 



LODIA 116 



— SONORA 117 



— Rhinostoma 118 



— Rhinocheilus 120 



— Haldea 122 



— Farancia 123 



— Abastor 125 



— Virginia 127 



— Celuta 128 



— Tantilla 131 



— Osceola 133 



— Storeria 135 



— Wenona 139 



— Rena 142 



iii 



