[11] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 595 

 Spennophilus aunulatus, Aud. and Bach. Annulated-tailed Spermophile. 



Western Mexico. 



Sciurus liudsonius hudsonius, (Pallas) Allen. Eastern Chickaree. Red Squirrel. 



Eastern and Central regions east of the Rocky Mountains, northward 

 to Alaska. 



Sciurus hudsonius Fremonti, (Aud. and Bach.) Allen. Fremont's Chickaree. 



Central Eegion, from Rocky Mountains westward and north to south- 

 ern Wyoming and Idaho. 



Sciurus hudsonius Richardsoni, (Bachman) Allen. Richardson's Chickaree. 



Western Montana and northern Idaho northward, 

 Sciurus hudsonius Douglassi, (Gray) Allen. Douglass's Chickaree. 



Pacific region from central California northward. 

 Sciiuns carolinensis leucotis, (Gapper) Allen. Northern Gray Squirrel. 



Eastern region. 

 Sciurus carolinensis carolinensis, (Gmelin) Allen. Southern Gray Squirrel. 



Austroriparian region, Mexico and southward. 



Sciurus carolinensis' yucatanensis, Allen. Yucatan Gray Squirrel. 



Yucatan. 



Sciurus niger ciner^us, (Linn6) Allen, Northern Fox-Squirrel. 



Atlantic coast from southern 'New England to Georgia. 



Sciurus niger niger, (Linn6) Allen. Southern Fox-Squirrel. 



Maryland to Louisiana. 

 Sciurus niger ludovicianus, (Custis) Allen. Western Fox-Squirrel. 



Basin of the Mississippi and tributaries. 



Sciurus fossor, Peale. California Gray Squirrel. 



Pacific region, from Oregon southward. 

 Sciurus Aberti, Woodhouse. Abert's Squirrel. 



Colorado and Arizona to northern Mexico. 

 Sciurus arizonensis, Couee. Arizona Squirrel. 



Arizona to Mexico. 



Sciurus aureogaster, F. Cuvier. Red-bellied Squirrel. 



California to Guatemala. 



Sciurus grii-'oflavus, (Gray) Alston. 

 Mexico and Guatemala. 



Sciurus hypopyrrhus, Wagler. Fire-bellied Squirrel. 



Mexico to Panama. 

 Sciurus Deppei, Peters. Deppe's Squirrel 



Mexico, Guatemala aud Colombia. 

 Sciurus aestuans rufo-niger, (Linn6) Allen. 



Nicaragua to Brazil. 



