[13] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 597 



Arvicola austerus, Le C. Prairie Meadow Mouae. 



Western States and adjoining Territories. Louisiana. 

 Arvicola austerus curtatus, Cope. Weetern Prairie Mouse. 



United States west of the Mississippi. 

 Arvicola oregonus, Bachman. Oregon Meadow Mouse. 



Pacific coast. 

 Arvicola ripatius borealis, (Ricli.) Coues. Little Northern Meadow Mouse. 



British America. 

 Arvicola riparius riparius, (Ord). Common American Meadow Mouse. 



All North America. 

 Arvicola xanthognathus, Leach. Chestnut-cheeked Meadow Mouse. 



North America north of the United States. 



Arvicola ToTvnsendi, Bachman. Townsend's Meadow Mouse. 



Oregon and Washington Territory. 

 Arvicola mexicanus, De Saussure. 



Mexico. 

 Hesperomys palustris, (Harlan) Baird. Rice-field Mouse. 



South Atlantic and Gulf States; Kansas. Mexico and Guatemala. 

 West Indies. 

 Hesperomys Couesi, Alston. 



Mexico and Guatemala. 

 Hesperomys leucogaster, (Max. zu Wied). Missouri Mole-Mouse. 



Region of the Upper Missouri. Red river of the North. 



Hesperomys torridus, Coues. Arizona Mole Mouse. 



Arizona. 

 Hesperomys leucopus leucopus, (Le Conte) Coues. White-footed Mouse. 



United States generally. 



Hesperomys leucopus gossypinus, (Le Conte) Coues. 



South Atlantic States ; Kansas. 

 Hesperomys leucopus sonoriensis, (Le Conte) Coues. 



Western central North America from Alaska to Mexico. 

 Hesperomys leucopus eremicus, (Baird) Coues. Desert Mouse. 



Valley of the Gila and Colorado Rivers. 



Hesperomys michigauensis, (A. & B.) Wagner. Michigan Mouse. 

 Upper Mississippi Valley. 



Hesperomys californicus, (Gambel) Baird. Parasitic Mouse. 



Southern California and Mexico. 

 Hesperomys aztecus, De Saussure. Aztec Mouse. 



California to Mexico. 

 Hesperomys mexicanus, De Saussure. 



Mexico. 



