List of Half-tone Illustrations 



PLATE FACING PAGE 



xcv. EMORY'S COLUBER, Coluber emoryi. A Powerful 

 Example of the Useful, Rat-eating Snakes- 

 Genus Coluber .... .300 



xcvi. CORN SNAKE, Coluber guttatus . . . .301 



SMOOTH-SCALED COLUBER, Rhinechis elegans . 301 



xcvii. HEADS OF SMOOTH-SCALED COLUBER, Rhinechis 



elegans, Arizona ..... 304 



PINE SNAKE, Pituopbis melanoleucus, New Jersey 



Phase. ....... 304 



PINE SNAKE, Pituophis melanoleucus. Florida Phase. 304 



BULL SNAKE, Pituophis catenifer. California. . 304 



xcviii. COMMON PINE SNAKE, Pituophis melanoleucus . 305 

 PINE SNAKE, Pituophis melanoleucus Southern 



Phase . : 305 



xcix. COMMON BULL SNAKE, Pituophis sayi. Largest of the 



North American Serpents. . . . 320 



PACIFIC BULL SNAKE, Pituophis catenifer . . 320 



c. KEELED GREEN SNAKE, Cydophis cestivus . . 321 



SMOOTH-SCALED GREEN SNAKE, Liopeltis vernalis 321 



ci. ROCK SNAKE, Hypsiglena ochrorhyncha . . 322 



PACIFIC BROWN SNAKE, Contia mitis . . . 322 



cii. EASTERN RING-NECKED SNAKE, Diadophis punctatus 323 



WESTERN RING-NECKED SNAKE, Diadophis amabilis 323 



ciii. HEADS OF MILK SNAKE, Ophibolus doliatus triangulus, 



New York ...... 334 



RED MILK SNAKE, 0. d. clericus, Virginia . . 334 

 BROWN KING SNAKE, O. rhombomaculatus, 



Virginia . % . 334 

 COMMON KING SNAKE, O. getulus, Florida . . 334 

 BOYLE'S KING SNAKE, O. getulus boylii, Cali- 

 fornia. ....... 334 



ARIZONA KING SNAKE, 0. fonatus, Arizona . . 334 



civ. BROWN KING SNAKE, Ophibolus rhombomaculatus. 



(Young Adult) . . . . 335 



BROWN KING SNAKE, Ophibolus rhombomaculatus 335 

 xxx 



