Contents 



CHAPTER 



XXVI. 



PAGB 



THE STRIPED SNAKES GARTER SNAKES; Genus 



Eutania 



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 . . -213 



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 . . 241 



XXVIII. SMALL, MISCELLANEOUS KEELED-SCALED SER- 

 PENTS; Genera Clonophis, Tropidoclonium, Sem- 

 inatrix, and Liodytes . . . . 261 



XXIX. THE BROWN SNAKES 



Small and Secretive Species, Representing 

 the Genera Storeria, Haldea, Amphiardis, 

 and Virginia ...... 266 



XXX. THE RACERS; Genera Spilotes and Zamenis 

 Large Non-constricting Serpents, Characterised 



by their Great Agility . . . . 274 



XXXI. THE FLAT-NOSED SNAKES; Genera Salvadora and 

 Phyllorbynchus 

 Unique Serpents of the Southwestern United 



States and Mexico . . 291 



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 . . 294 



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 . 315 



xviii 



