CONTENTS. 



Page 



Preface "^ 



Introduction ^ii 



Explanation of Terms used vii 



Synopsis of Families and Genera, and Systematic Index of 

 Species of North American Serpents ix 



Genus Crotalus 1 



— Crotalophobus 11 



— Agkistrodon 17 



— toxicophis 1^ 



— Elaps 21 



— Eutainia 24 



— Nerodia 38 



— Regina 45 



— NiNiA 40 



— Heterodon 51 



PiTUOPHlS 64 



scotophis ''^ 



— Ophibolus 82 



— Georgia 92 



— Bascanion 93 



— Masticophis 98 



— Salvadora 104 



— Leptophis 106 



— Chlorosoma 1C8 



CONTIA 110 



DiADOPIIIS 11^ 



LODIA 11^' 



— SONORA 11" 



PiHINOSTOMA 118 



— RniNOCiiEiLus 120 



— Haldea ; 122 



— Farancia 12'^ 



— Abastor 125 



— Virginia 12" 



— Celuta 128 



— Tantilla 131 



— Osceola 133 



— Rtoeebia 135 



— AVenona 139 



— Rena 142 



