Ivist of Illustration* 

 VAONG r*os 



weaver Lodges and a Dam ^^g 



A Pair of Woodchucks by their Burrow (Arctomys monax) , ^ | 



Woodchuck (Arctomys monax) ,54 



Prairie Dogs (Cynomys ludovicianus) . . . . ,56 



Western Spermophile (SpermophilusJ, photographed in 



Colorado 158 



Say's Spermophile ( Spermophilus lateralis) . , . 161 



White-tailed Spermophile (Spermophilus leucurus) . . 163 



Young of Columbia Spermophile (^5/)^rw<7/)A/7«5 columbianus) 1O3 



Say's Spermophile in Snow (Spermophilus lateralis) . 165 



Young Prairie Dog (Cynomys ludovicianus), about one-third 



grown 163 



Western Chipmunk (Tamias quadrivitatus) . . . 167 



Chipmunk (Tamias striatus) 168 



Gray Squirrel (Sciurus carolinensis) 170 



Red Squirrels (Sciurus hudsonicus gymnicus) . . 172 



Young Red Squirrel (Sciurus hudsonicus gymnicus) . 174 



Hoary Marmot (Arctomys Pruinosus) . . . . 174 



Pine Squirrel (Sciurus hudsonicus richardsoni) , . 176 



Flying Squirrel ( Sciuropterus volans) . . . . 179 



Common Mole (Scalops aquaticus) . . . . 190 



Star-nosed Mole (Condylura cristata) .... 190 



Marsh Shrew (Sorex palustris) 190 



Four Common Eastern Bats 198 



Sea-lion (Zalophus calif ornianus) 208 



Sea-lion (Zalophus calif ornianus), barking . . . 211 



Walrus Bulls and Cows (Odohenus rosmarus) . . , 212 



Fur Seals (Otoes alascanus) 216 



Harbor Seals (Phoca vitulina) 216 



Otter (Lutra canadensis ) 222 



Skunk (Mephitis putida), crossing a stream . . . 231 



Mink (Putorius vison) 234 



Weasel (Putorius noveboracensis) 234 



American Sable or Pine Marten (Mustela americana). . 244 



Wolverine or Carcajou (Gulo luscus) .... 246 



