THE GRAY GOPHERS 113 



Gulf coast; the yellower, larger, chestnut- 

 faced gopher (Cratogeomys castanops), occur- 

 ring from Colorado southwestward ; and the 



NORTHERN GRAY GOPHER (THOMOMYS TALPOIDES). 

 Photographed hy H. K. Jb, and reproduced by permission. 



smaller northern gray gopher, or mole-go- 

 pher (Thomomys talpoides), which is the fa- 

 miliar of the Dakotas, Wyoming and the Cana- 



