1. Rattlesnake. Crotalm. horriclui idurissus). 



Length, sixty inches; stout ; light gray-brown, with three rows of red Ijrown, (lari<-brown or black spots, more or 

 less confluent ; sometimes spots blurr, forming zigzag bands or broad cross bars ; head, broad and triangular ; forehead 

 covered with scales not larger than those of the back; the upper jaw with two large fang teeth containing the ])oison ; 

 last joints of tail horny and tiat, forming the rattles; end of tail blunt. 



1. Hassasauga. Prairik Rattlesnake. Sii/rurus cati-nafus. 



Length, thirty inclies : blackish-brown, with seven rows of black and yellow-edged chestnut-colored square spots; 

 forehead coverctl with larger plates or scale.> than those of neck; upper jaw wiih poisonous fang teeth; rattles 

 small. 



Western and .Southern. 



(IT) 



