Genus =Phenacomys= Merriam--heather voles and tree mice _Phenacomys intermedius intermedius_ } Merriam } heather vole _Phenacomys intermedius oramontis_ } Rhoads } Genus =Clethrionomys= Tilesius--red-backed mice _Clethrionomys gapperi saturatus_ } (Rhoads) } _Clethrionomys gapperi idahoensis_ } (Merriam) } Gapper red-backed _Clethrionomys gapperi cascadensis_ } mouse Booth } _Clethrionomys gapperi nivarius_ } (Bailey) } _Clethrionomys californicus } California red-backed occidentalis_ (Merriam) } mouse Genus =Microtus= Schrank--meadow mice _Microtus pennsylvanicus funebris_ Dale } Pennsylvania meadow _Microtus pennsylvanicus kincaidi_ } mouse Dalquest } _Microtus montanus nanus_ (Merriam) } montane meadow _Microtus montanus canescens_ Bailey } mouse _Microtus townsendii townsendii_ } (Bachman) } Townsend meadow _Microtus townsendii pugeti_ Dalquest } mouse _Microtus longicaudus halli_ Ellerman } long-tailed meadow _Microtus longicaudus macrurus_ Merriam } mouse _Microtus richardsoni arvicoloides_ } (Rhoads) } water rat _Microtus richardsoni macropus_ (Merriam) } _Microtus oregoni oregoni_ (Bachman) creeping mouse Genus =Lagurus= Gloger--short-tailed voles _Lagurus curtatus pauperrimus_ (Cooper) sagebrush vole Genus =Ondatra= Link--muskrat _Ondatra zibethicus osoyoosensis_ (Lord) } _Ondatra zibethicus occipitalis_ (Elliot) } muskrat Genus =Rattus= Fischer--Old World rats _Rattus rattus rattus_ (Linnaeus) } roof rat _Rattus rattus alexandrinus_ (Geoffroy) } _Rattus norvegicus norvegicus_ (Erxleben) Norway rat Genus =Mus= Linnaeus--house mice _Mus musculus_ Linnaeus, subsp.? house mouse Family APLONTIDAE--mountain beaver Genus =Aplodontia= Richardson--mountain beaver _Aplodontia rufa rufa_ (Rafinesque) } _Aplodontia rufa rainieri_ Merriam } mountain beaver Family DIPODIDAE--jumping mice and allies Genus =Zapus= Coues--jumping mice _Zapus princeps trinotatus_ Rhoads } _Zapus princeps kootenayensis_ Anderson } big jumping mouse _Zapus princeps idahoensis_ Davis } _Zapus princeps oregonus_ Preble }