8 CONTENTS. 



PAGE. 



Hypsiglena 178 



ochrorhynchus (Spotted Night Snake). 178 



Salvadora 180 



grahamiaB (Patched-nosed Snake) 181 



Bascanion \ 183 



, constrictor vetustum (Western Yellow-bellied Racer) 183 



flagellum frenatum (Western Whip Snake) 186 



laterale (Californian Eacer) 188 



. taeniatum (Striped Racer) 190 



Arizona 192 



elegans (Faded Snake) 193 



Pituophis 195 



catenifer (Western Gopher Snake) 195 



deserticola (Desert Gopher Snake) 198 



Thamnophis 199 



parietalis (Pacific Garter Snake) 200 



pickeringii (Northwestern Garter Snake) 204 



leptocephala (Puget Garter Snake) 205 



elegans (Elegant Garter Snake) 207 



vagrans (Wandering Garter Snake) 210 



biscutata (Cope's Garter Snake) 212 



hammondii (Californian Garter Snake) 212 



CrotalidcK . . 214 



Crotalus 215 



lucifer (Pacific Rattlesnake) 216 



confluentus (Prairie Rattlesnake) 218 



tigris (Tiger Rattlesnake) 220 



cerastes (Horned Rattlesnake. Sidewinder) 222 



mitchellii (Bleached Rattlesnake) 224 



ruber (Western Diamond Rattlesnake) 226 



INDEX . . . . 229 



