Contents 



XXVI. THE STRIPED SNAKES GARTER SNAKES; Genus 



Eut&nia 



A Genus of North American Snakes that are 

 Noted for their Abundance and the Great 

 Variation of Pattern Among Some of the 

 Species Key to the Identification of Species 

 Detailed Descriptions Keys to the Iden- 

 tification of Varieties Habits . . 



XXVII. THE WATER SNAKES; Genus Tropidonotus 



A Large Genus of Semi-aquatic Serpents that 

 Occur in both the Eastern and Western 

 Hemispheres Descriptions of the North 

 American Species Their Habits . . 



XXVI 1 1. SMALL, MISCELLANEOUS KEELED-SCALED SER- 

 PENTS; Genera Chnopbis, Tropidoclonium, Sem- 

 inatrix. and Liodytts ..... 



241 



261 



XXIX. THE BROWN SNAKES 



Small and Secretive Species, Representing 

 the Genera Storeria, Haldea, Ampbiardis, 

 and Virginia ...... 266 



XXX. THE RACERS; Genera Spilotes and Zamenis 



Large Non-constricting Serpents, Characterised 



by their Great Agility . . 



XXXI. THE FLAT-NOSED SNAKES; Genera Salvadora and 

 Pbyllorbyncbus 



Unique Serpents of the Southwestern United 

 States and Mexico ..... 



XXXII. THE RAT SNAKES OR COLUBERS; Genus Coluber 

 Large and Powerful Constricting Serpents. 



They are of Considerable Economic Value 

 in Destroying Animals that are Injurious 

 to Agricultural Pursuits 



XXXIII. THE BULL SNAKES; Genus Pituopbis 



Large Constricting Snakes that are Closely Allied 

 to the Rat Snakes Descriptions of the 

 Three North American Species Their 

 Habits 



xviii 



274 



291 



