32 MAMMALS. 



FOOTED Mouse. Yellowish brown; tail distinctly bicolor, 

 about as long as head and body; hind feet more than f 

 inch. N. Am.; abundant. 



2. H. michiganensis, (Aud. & Bach.) Wagner. Michi- 

 gan Mouse. Tail little longer than body without head, 

 bicolor; hind feet less than f inch; dark brown; a 

 darker dorsal band; L. 3, or less, to base of tail. Upper 

 Miss. Valley to Mich., etc. 



3. H. aureolus, (Aud. & Bach.) Wagner. Red Mouse. 



Yellowish cinnamon, bright especially on ears; belly not 



pure white. Pa. to Ills., and S. 



** Soles naked; tail scant-haired, about as long as head and body; 

 ears small. {Oryzomys.) 



4. H. palustris, (Harlan) Baird. Rice -field Mouse. 

 Blackish and ashy above, becoming paler below; fur 

 harsh, l^ut compact; a large rat -like species. S. States, 

 N. to N. J. and Kas. 



4. OCHETODON, Coues. Harvest Mice. 

 < ReitliTodon^ Baird. 

 1. 0. hum His, (Aud. & Bach.) Coues. Harvest Mouse. 

 Tail shorter than head and body; appearance decidedly 

 mouse -like. U. S., southerly, N. to Iowa. 



5. Ei/OTOMYS, Coues. Long -eared Mice. 

 < Arvicola, Bd. 

 1. E. rut// us (Pall.) var. gapperi, (Vigors) Coues. Long- 

 eared Mouse. Color chestnut ; ears prominent ; a 

 brownish dorsal band; size of common mouse. North- 

 ern frontier, S. to Mass. 



6. ARVICOLA, Lacepede. Field Mice. 



* Back upper molar with two external triangles and a posterior 

 crescent; middle upper molar with two internal triangles; 

 front lower molar witli three internal and two or three latei-al 

 triangles ; size large. ( Myonomes.) 



