Contents 



CHAPTER PAGE 



XXVI. Thf. Striped Snakes — Garter Snakes; Genus 



[uittrnia 



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. Tin; Water Snakes; Genus Tropidonotus 



A Large Genus of Semi-aquatic Serpents that 

 Occur in both the Eastern and Vv'estern 

 Hemispheres — Descriptions of the North 

 American Species — Their Habits 241 



X.WIII. Small, Miscellaneous Keeled-scaled Ser- 

 pents; Genera Clonophis, Tropidodoninm, Scm- 

 inatrix, and Liodytes ..... 261 



XXIX. The Brown Snakes 



Small and Secretive Species, Representing 

 the Genera Storeria, Haklea, Amphiardis, 

 and I'irginia ...... 266 



XXX. The Racers; Genera Spihies and Zamenis 

 Large Non-constricting Serpents, Characterised 



by their Great Agility . . . . 274 



XXXI. The Flat-nosed Snakes; Genera Salvadora and 

 Phyllorhynchus 

 Unique Serpents of the Southwestern United 



States and Mexico . . . . .291 



XXXII. The Rat Snakes or Colubers; Genus CoZzifcer 

 Large and Powerful Constricting Serpents. 



They arc of Considerable Economic Value 

 in Destroying Animals that are Injurious 

 to Agricultural Pursuits 294 



XXXIII. The Bull Snakes; Genus Pihiophis 



Large Constricting Snakes that are Closely Allied 

 to the Rat Snakes — Descriptions of the 

 Three North American Species — Their 



Habits 315 



xviii 



