FEB., 1912. Mammats or ILLINOIS AND WISCONSIN — Cory. 31 
SuBFrAMILy SCIURIN/. 
Genus SCIURUS. 
SuBGENUS PARASCIURUS. 
Sciurus niger rufiventer (GEOFFROY). Western Fox’ Squirrel. 
SuBGENus NEOSCIURUS. 
Sciurus carolinensis GMELIN. Southern Gray Squirrel. 
Sciurus carolinensis leucotis (GAPPER). Northern Gray Squirrel. 
SuBGENus TAMIASCIURUS. 
Sciurus hudsonicus logquax BANGs. Southern Red Squirrel. 
Genus TAMIAS. 
Tamias striatus (LINN.). Chipmunk. 
Tamias striatus griseus MEARNS. Gray Striped Chipmunk. 
Genus EUTAMIAS. 
Eutamias borealis neglectus (ALLEN). Little Chipmunk. 
SupraMity MARMOTIN&. 
Genus CITELLUS. 
Suscenus ICTIDOMYS. 
Citellus tridecemlineatus (MITCHILL). Striped Ground Squirrel, ‘‘Gopher.”’ 
Citellus franklint (SABINE). Franklin’s Ground Squirrel, ‘‘Gray Gopher." 
Genus MARMOTA. 
Marmota monax (LINN.). Woodchuck. 
Marmota monax canadensis (ERXLEBEN). Canada Woodchuck. 
Famity CASTORID. BEAvVERs. 
Genus CASTOR. 
Castor canadensis Kuunv. Beaver. 
Famity MURIDAE. Rats anp MICcE. 
SuBFrAMiILy MURINE. 
Genus MUS. 
Mus musculus L1NN, House Mouse. 
Genus EPIMYS. 
Epimys norvegicus (ERXLEBEN). Norway Rat, House Rat. 
[Epimys rattus (LINN.). Black Rat.] 
SuBFAMILY CRICETIN. 
Genus PEROMYSCUS. 
SuBGENUS PEROMYSCUS. 
Peromyscus leucopus (RAFIN.). White-footed Mouse. 
Peromyscus leucopus noveboracensis (FiscHER). Northern White-footed Mouse. 
Peromyscus maniculatus bairdi (Hoy AND KEwnnicoTr). Prairie White-footed 
Mouse. 
Peromyscus maniculatus gracilis (LEConTE). Canadian White-footed Mouse. 
Peromyscus gossypinus megacephalus (RHOADS). Western Cotton Mouse. 
