Genus =Citellus= Oken--ground squirrels _Citellus townsendii townsendii_ (Bachman) Townsend ground squirrel _Citellus washingtoni_ Howell Washington ground squirrel _Citellus columbianus columbianus_ (Ord) } _Citellus columbianus ruficaudus_ Howell } Columbian ground squirrel _Citellus beecheyi douglasii_ (Richardson) Beechey ground squirrel _Citellus lateralis tescorum_ (Hollister) } _Citellus lateralis connectens_ (Howell) } golden-mantled ground _Citellus saturatus_ (Rhoads) } squirrel Genus =Sciurus= Linnaeus--tree squirrels _Sciurus griseus griseus_ Ord western gray squirrel _Sciurus carolinensis hypophaeus_ Merriam eastern gray squirrel _Sciurus niger_ Linnaeus, subsp.? fox squirrel Genus =Tamiasciurus= Trouessart--red squirrels _Tamiasciurus hudsonicus streatori_ } (Allen) } _Tamiasciurus hudsonicus richardsoni_ } red squirrel (Bachman) } _Tamiasciurus douglasii douglasii_ } (Bachman) } Douglas squirrel Genus =Glaucomys= Thomas--American flying squirrels _Glaucomys sabrinus oregonensis_ } (Bachman) } _Glaucomys sabrinus bangsi_ (Rhoads) } northern flying _Glaucomys sabrinus columbiensis_ Howell } squirrel _Glaucomys sabrinus latipes_ Howell } _Glaucomys sabrinus fuliginosus_ (Rhoads) } Family HETEROMYIDAE--pocket mice, kangaroo mice and kangaroo rats Genus =Perognathus= Weid--pocket mice _Perognathus parvus parvus_ (Peale) } great basin pocket _Perognathus parvus lordi_ (Gray) } mouse _Perognathus parvus columbianus_ Merriam } Genus =Dipodomys= Gray--kangaroo rats _Dipodomys ordii columbianus_ (Merriam) Ord kangaroo rat