224 Field Museum of Natural History — Zoology, Vol. XI. 



*Area of Intergradatlon 



Map illustrating approximate distribution of Pine Mice belonging to the subgenus Pitymys. 



Microtus pinetorum (LeConte). (Ann. Lye. Nat. Hist. N. Y., Ill, 1830, p. 133.) 

 Type locality — • Pine forests of Georgia. General color cinnamon or russet 

 brown; belly dusky, more or less tinged with russet brown; tail short; ears 

 very small. Total length, about 4.50 inches; tail vertebrae, .70 inch. 



Microtus p. scalopsoides (Aud. & Bach.). (Proc. Acad. Nat. Sci. Phila., I, 1841, p. 

 97.) Type locality — Long Island, New York. Larger and darker than pine- 

 torum. Description as previously given. 



Microtus p. auricularis Bailey. (Proc. Biol. Soc. Wash., XII, 1898, p. 90.) Type 

 locality — Washington, Adams Co., Mississippi. About equal in size to pine- 

 torum, but color approaching scalopsoides; fur thick and dense. 



Microtus nemoralis (Bailey). (Proc. Biol. Soc. Wash., XII, 1898, p. 89.) Type 

 locality — Stilwell (Boston Mountains) , Indian Territory. Largest of the 

 subgenus and coloration somewhat lighter than scalopsoides. 



