Family GEOMYIDAE--pocket gophers Genus =Thomomys= Weid--smooth-toothed pocket gophers _Thomomys talpoides devexus_ Hall and } Dalquest } _Thomomys talpoides columbianus_ Bailey } _Thomomys talpoides aequalidens_ } Dalquest } _Thomomys talpoides wallowa_ Hall } and Orr } _Thomomys talpoides fuscus_ Merriam } _Thomomys talpoides yakimensis_ Hall } and Dalquest } _Thomomys talpoides shawi_ Taylor } _Thomomys talpoides immunis_ Hall and } Dalquest } northern pocket _Thomomys talpoides limosus_ Merriam } gopher _Thomomys talpoides douglasii_ } (Richardson) } _Thomomys talpoides glacialis_ Dalquest } and Scheffer } _Thomomys talpoides tacomensis_ Taylor } _Thomomys talpoides pugetensis_ Dalquest } and Scheffer } _Thomomys talpoides tumuli_ Dalquest } and Scheffer } _Thomomys talpoides yelmensis_ Merriam } _Thomomys talpoides couchi_ Goldman } _Thomomys talpoides melanops_ Merriam } Family CASTORIDAE--beavers Genus =Castor= Linnaeus--beavers _Castor canadensis leucodonta_ Gray } _Castor canadensis idoneus_ Jewett and } beaver Hall } Family MURIDAE--rats and mice Genus =Onychomys= Baird--grasshopper mice _Onychomys leucogaster fuscogriseus_ } northern grasshopper Anthony } mouse Genus =Reithrodontomys= Giglioli--American harvest mice _Reithrodontomys megalotis megalotis_ } western harvest (Baird) } mouse Genus =Peromyscus= Gloger--white-footed mice _Peromyscus maniculatus oreas_ Bangs } _Peromyscus maniculatus hollisteri_ } Osgood } _Peromyscus maniculatus austerus_ (Baird) } _Peromyscus maniculatus rubidus_ Osgood } deer mouse _Peromyscus maniculatus gambelii_ (Baird) } _Peromyscus maniculatus artemisiae_ } (Rhoads) } Genus =Neotoma= Say and Ord--wood rats _Neotoma cinerea occidentalis_ Baird } bushy-tailed wood rat _Neotoma cinerea alticola_ Hooper } Genus =Synaptomys= Baird--lemming mice _Synaptomys borealis wrangeli_ Merriam northern lemming mouse