REVISION OF THE KING SNAKES. 23 



€e^. Dorsal saddles 23 

 to 35, extend- 

 ing down to 

 the third row 

 of scales, or 

 lower; only 

 one series of 

 alter n a t i n g 

 spots; head 

 markings of tri- 

 cngulum only 

 partially or not 

 at all devel- 

 oped. 



syspila,Y>. 179. 

 (Southern 

 Indiana to 

 Minn e s o t a , 

 south to cen- 

 tral Arkansas 

 and west to 

 central Kan- 

 sas.) 

 dd^. Infralabials 10; 

 tail more than 

 .16 of total 

 length; a dark 

 ])Iotch behind 

 the eye. 

 mexicana,'p.24b. 

 (San Luis Po- 

 tosi, Mexico.) 

 p^. Whitish cross bands on body and tail more than 

 40; top of head black, snout uniformly white. 



pyrrhomelaena, p. 231. 

 (Utah, Arizona, Western New Mexico, and 

 northern Mexico. 



