214 Fretp Museum or Natural History — Zoétocy, Vou. XI. 
B. Total length less than 5.50 inches; tail 1 inch or less long. 
Upper parts dark chestnut brown; under parts plumbeous gray, more or less 
tinged with buff; fur soft, suggesting that of a mole; plantar tubercles 5; 
mamme 4; claws on fore feet longest. 
Mo Le Mouse or MOLE-LikE VOLE. 
Microtus pinetorum scalopsoides, p. 222. 
: Subgenus MICROTUS Schrank. 
Plantar tubercles 6; crown of third upper molar with 5 or more 
irregular loops, the middle ones forming three closed triangles; mammz 
8 in our species, 4 pectoral and 4 inguinal. 
Microtus pennsylvanicus (Orp). 
Merapow Movse. Merapow VOLE. 
Mus pennsylvanica OrD, Guthrie’s Geography, 2nd Amer. ed., IT, 1815, p. 292. 
Arvicola riparius, LAPHAM, Trans. Wis. State Agr. Soc., II, 1852 (1853), p. 340 
(Wisconsin). Kenwnicott, Trans. Ill. State Agr., Soc., I, 1853-54 (1855), p. 
579 (Cook Co., Illinois). Jb., Agr. Rept. for 1856, U. S. Patent Office Rept., 
1857, p. 104 (Illinois). Mures, Rept. Geol. Surv. Mich., 1860 (1861), p. 221 
(Michigan). ALLEN, Proc. Bost. Soc. Nat. Hist., XIII, 1869 (1871), p. 193 
(Iowa). Cours, Monog. N. Amer. Rodentia, 1877, p. 165 (Illinois, Wisconsin, 
Missouri, etc.). OsBorn, Proc. Iowa Acad. Sci. I, 1887-89 (1890), p. 43 (Iowa). 
StronG, Geol. Wis., Surv. 1873-79, I, 1883, p. 439 (Wisconsin). 
Microtus pennsylvanicus Ruoaps, Proc. Acad. Nat. Sci. Phila., 1896 (1897), p. 185 
(Tennessee). Baitey, N. Amer. Fauna, No. 17, 1900, p. 16 (Michigan, Illinois, 
Wisconsin, Missouri, Iowa, Minnesota, etc.). SNYDER, Bull. Wis. Nat. Hist. 
Soc., II, 1902, p. 117 (Wisconsin). Haun, Proc. U. S. Nat. Mus., XXXII, 
1907, p. 459 (Kankakee Valley, Indiana). Lantz, U.S. Dept. Agr., Biol. Surv., 
Bull. No. 31, 1907, p. 15. McATEE, Proc. Biol. Soc. Wash., XX, 1907, p. 5 
(Munroe Co., Indiana), Jackson, Bull. Wis. Nat. Hist. Soc., VI, 1908, p. 22 
(Wisconsin). Haun, Ann. Rept. Dept. Geol. & Nat. Resources Ind., 1908 
(1909), p. 506 (Indiana). Howe t, Proc. Biol. Soc. Wash., XXIII, 1910, p. 29 
(Kentucky). 
Type locality — Meadows below Philadelphia, Pennsylvania. 
Distribution — Northeastern United States, from northern border of 
Quebec and Ontario to Virginia and in the mountains of North 
Carolina and Tennessee west to Nebraska, Minnesota and South 
Dakota. Occurs throughout about the northern two-thirds of 
Illinois and the whole of Wisconsin. 
Description — Upper parts dark chestnut brown, at times ochraceous 
chestnut; the fur on back mixed with blackish hairs; sides of body 
lighter than back; under parts slaty plumbeous, occasionally with 
a slight wash of pale cinnamon brown; feet brownish; tail dark 
above, somewhat paler below; other characters as given for the 
subgenus. 
