[9] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 593 



Suborder Perissodactyla. 

 Family TAPIRID^. The Tapirs. 



lilasmognathus Bairdii, Gill. Baird's Tapir. 



Mexico to Panama. 

 Elasmognathus Do'wi, Gill. Do.v's Tapir. 



Guatemala to Costa Rica. 



Order RODENTIA. Rodents. 



Suborder Simplicidentata. 

 Family SCIURID^. The Squirrels. 



Arctomys pruinosus, Gmelin. Hoary Marmot. 



Columbia River northward to Alaska aud (?) eastward to Hudson's 

 Bay. 



Arctomys monax, (Linn6) Schreber. Woodcliuck. 



Eastern region of the United States and northward. 

 Arctomys flaviventer, Aud. aud Bach. Rocky Mountain Marmot. 



Texas, Sonoran region aud northward in the Rocky Mountains. 



Cynomys columbianus, (Ord) Allen. Western Barking Squirrel ; Western "Prairie 

 Dog." 



Rocky Mountain region. 



Cynomys ludovicianus. (Ord)Baird. Missouri Barking Squirrel ; Missouri " Prairie 

 Dog." 



Central regiou from 49° N. Lat. southward into Mexico. 

 Tamias striatus, (Liuue) Baird. Striped Squirrel: Common Chipmunk. 



Eastern region of the United States to Canada. 

 Tamias lateralis, [Say) Allen. Say's Chipmunk. 



Central regiou west of Kansas and Nebraska and northward. 

 Tam.ias asiaticus borealis, Allen. Northern Chipmunk. 



^Northwestern North America southward to United States. Europe. 

 Asia. 

 Tamias asiaticus Townsendi, (Bachmau) Allen. Townsend's Chipmunk. 



Northern California to British Columbia. 

 Tamias asiaticus pallidus, Allen. Pale Chipmunk. 



Plains of Upper Missouri aud Yellowstone Rivers aud Great Basiu. 



Tamias asiaticus quadivittatus, (Say) Allen. Rocky Mountain Chipmunk. 



Central regiou west of the Rocky Mountains. Southern Californian 

 region and Northern Mexico. 



Tamias asiaticus dcrsalis, (Baird) Allen. Gila Chipmunk. 



New Mexico, Nevada and Arizona. 

 Proc. Nat. Mus. 84 38 



