MICROTUS. 



Fig. 41. MicROTus (Pitymys) pinetorum. 



No. 4^4 Field Columbian Museum Coll. Nat. size. 



Lower tooth row. Upper tooth row. 



Enlarged 5 times. Enlarged 5 times. 



297 



Ann. Lye. Nat. Hist. 



pinetorum. [Psami/iomys), Le Conte, 



N. Y., Ill, 1829, p. 132, pi. 2. 

 Type locality. Eastern Georgia. Riceboro? 



Georgia, North and South Carolina, and Florida. 

 Ears short, naked, concealed in the fur; legs short; 

 Two middle triangles of third upper molar some- 



Geogr. Distr. 



Genl. Char. 

 tail short, hairj-. 

 times confluent. 



Color. Above russet brown; flanks paler, beneath plumbeous 

 washed with russet. Feet ash, tinged with flesh color. 



Measurements. Total length, 1 16-126; tail vertebrae, 21; hind 

 foot, 15-16.5. 



a. — scalopsoides (Arviiola), Aud. and Bach., Proc. Acad. Nat. Scien. 

 Phil., 1841, p. 97. 



apella, Le Conte, Proc. Acad. Nat. Scien. Phila., 1853, p. 405. 



kennicoiti, Baird, N. Am. Mamm., 1857, p. 547. 



Type locality. Long Island, New York. 



Geogr. Distr. Southern New York grading along the coast into 

 M. pinetorum; westward to Illinois. 



Genl. Char. Tail short, not as long as the head; fur short, silky, 

 lustrous. 



Color. Above brownish chestnut, hairs tipped with dusky, sides 

 lighter; beneath light cinerous, fur at base plumbeous. Feet brown- 

 ish gray. Tail, above sooty, beneath grayish. 



Measurements. Total length, 120-125; tail, 20; hind foot, 14-16. 



b.—auriculnris. [Microtus), Bailey, Proc. Biol. Soc.Wash., 1898, p. 90. 



Type locality. Washington, Mississippi. 



Geogr. Distr. Alleghan\- Mountains to the Mississippi River. 



Genl. Char. Size small; ears large, above the fur; colors dark; 

 pterygoid fossa U-shaped ; third upper molar with three closed tri- 



