2i8 Field Museum of Natural History ^ — Zoology, Vol. XL 



Specimens examined from Illinois, Wisconsin and adjoining states: 

 Illinois — Fox Lake, 19; Camp Logan, 2; Chicago, 2; Galena, 4=27. 

 Wisconsin — Sayner, 21; Solon Springs, 7; Beaver Dam, 69; Spread 

 Eagle, 4; Conover, 2; Lake Koshkonong, i; (M. P. M.) Pewaukee, 

 3; North Milwaukee, 24; Newport, Door Co., i; Mouth of Yellow 

 River, 5; Prescott, 7; Gordon, Douglas Co., i; Nagawicka Lake, 3; 

 Kelley Brook, Oconto Co., 3; Fountain City, i; Maiden Rock, i; 

 Prescott, Pierce Co., 51; Prairie du Sac, Sauk Co., 21; (O. C.) 

 Fisher Lake, Iron Co., 11; Whitefish Bay, Milwaukee Co., i; Saxe- 

 ville, Waukesha Co., i; Milwaukee, 4= 242. 

 Indiana — La Porte, 4. 

 Iowa — Knoxville, 2; Luxemburg, 3 = 5. 

 Michigan — Dowagiac, Cass Co., 5. 



Microtus xanthognathus (Leach), Yellow-nosed Vole, was re- 

 corded by Lapham from Wisconsin (Trans. Wis. State Agr. Soc, II, 

 1852 (1853), p. 340), but the record was based on Hoy's notes and is 

 undoubtedly an error. The known range of this species extends from 

 Alberta, Canada, north and west to the Arctic coast and Alaska. 



Subgenus PEDOMYS Baird. 



Plantar tubercles 5 ; crown of third upper molar showing 4 irregu- 

 lar loops, the middle ones forming 2 closed triangles; mammae 6, 4 

 inguinal and 2 pectoral; skull narrow and high. For illustrations of 

 teeth and foot, see page 213. 



Microtus ochrogaster (Wagner). 

 Prairie Meadow Mouse. Prairie Vole. 



H[ypud(Tus] ochrogaster Wagner, Schreber's Saugthiere, Suppl., Ill, 1843, p. 592. 



Arvicola hirsutus Lapham, Trans. Wis. State Agr. Soc, II, 1852 (1853), p. 340 (Wis- 

 consin). 



Arvicola austerus Kennicott, Agr. Rept. for 1856, U. S. Patent Office Rept., 1857, 

 p. 97 (Illinois). CouES, Monog. N. Amer. Rodentia, 1877, p. 213 (Illinois, Wiscon- 

 sin, Missouri, etc.). Strong, Geol. Wis., Surv. 1873-79, 1. 1883, p. 439 (Wiscon- 

 sin). EvERMANN & Butler, Proc. Ind. Acad. Sci., 1893 (1894), p. 127 (Indiana). 



Microtus austerus Bailey, N. Amer. Fauna, No. 17, 1900, p. 73 (Wisconsin, Illinois, 

 Indiana, Iowa, Missouri, etc.). Snyder, Bull. Wis. Nat. Hist. Soc, II, 1902, 

 p. 118 (Wisconsin). McAtee, Proc. Biol. Soc. Wash., XX, 1907, p. 6 (Indiana). 

 Van Hyning & Pellett, Proc. Iowa Acad. Sci., XVII, 1910, p. 213 (Iowa). 



Microtus {Pedomys) ochrogaster Ali-bn, Bull. Amer. Mus. Nat. Hist., X, 1898, p. 459. 



Microtus ochrogaster Osgood, Proc. Biol. Soc. Wash., XX, 1907, p. 48. Jackson, 

 Bull. Wis. Nat. Hist. Soc, VI, 1908, p. 23 (Wisconsin). Jackson, Proc. Biol. 

 Soc. Wash., XX, 1907, p. 73 (S. W. Missouri). Hahn, Ann. Rept. Dept. Geol. 

 & Nat. Resources Ind., 1908 (1909), p. 509 (Indiana). Howell, Proc. Biol. 

 Soc. Wash., XXIII, 1910, p. 29 (Illinois, Missouri). 



