348 VERTEBRATE ANIMALS OF THE UNITED STATES 



C. s. pratensis (Merr.). Size small; length 197 mm.; colors dark: 

 northwestern Arizona. 



C. s. arens (Bailey). Colors pale; spots small: southwestern 

 Texas. 



C. s. annedans (Merr.). Color grayish brown; spots buff: southern 

 coast region of Texas. 



C. tereticaudus (Baird). Color grizzled grayish brown, without 

 spots; tail very long; length 248 mm.; tail 112 mm.; hind foot 35 mm.: 

 central California to southern Arizona. 



C. neglectus (Merr.). Like C. tereticaudus but with a much shorter 

 tail; length 278 mm.; tail 74 mm.; hind foot 32 mm.: Arizona. 



C. cryptospilotus (Merr.). Color pale buff, without spots; length 

 190 mm.; tail 60 mm.; hind foot 32 mm.: Painted Desert, Arizona. 



C. ohsoletus (Kennicott). Color light gray, spotted indistinctly; 

 length 205 mm.; tail 50 mm.: Black Hills and western Nebraska; west- 

 ward to Utah. 



C. elegans (Kenn.). Color uniform dusky yellowish brown, with- 

 out spots; length 311 mm.; tail 82 mm.; hind foot 46 mm,: Wyoming^ 

 northern Utah and northwestern Colorado; Transition and Upper 

 Sonoran zones. 



C. armatus (Kenn.). Color uniform dark gray, without spots; 

 length 254 mm.; tail 50 mm.: Wyoming, Idaho and Montana. 



C. richardsoni (Sab.). Similar to C. elegans, but paler: North 

 Dakota and Montana; Canada. 



C. columbianus (Ord.). Color yellowish brown, with many white 

 blotches; length 370 mm.; tail 88 mm.; hind foot 44 mm.: western 

 Montana to Washington. 



C. grammurus (Say). Color mottled gray; length 530 mm.; tail 

 200 mm.; hind foot 60 mm.: central Colorado south into Mexico. 



Subspecies of C. grammurus 



C. g. huckleyi (Slack). Head and shoulders black; back grizzled 

 black and white: western Texas. 



C. g. fisheri (Merr.). Neck and shoulder with silvery stripes; 

 whitish spots on the sides; length 415 mm.: central and southern 

 California. 



C. g. beecheyi (Richardson). Color yellowish brown; back indis- 

 tinctly spotted; length 402 mm.: western California, north of San 

 Francisco. 



C. g. douglasi (Rich.). Like C. g. beecheyi, but with neck and 

 shoulders black: northern California to the Columbia. 



