UNITED STATES OBOLOGIOAL SURVEY OV THE TERRITORIES. 



MONOGRAPHS 



NORTH AMERICAN 



RODENTIA. 



ELLIOTT OOUES, 



OAPTAIM AND AH8IHTAMT 8UII0KON rNITKD g.'ATKS ARMY, 

 BKCRKTAIIV ANI> KATtlRAMST OF THE 8PPVF.V ; 



JOEL ASAPH ALLEN, 



AgSUTANT IN TUK MUSBDM Or COMPARATIVK ZOfiLOOY, CAMBRIBOB, 

 8PBCIAI, CObLARORATOR OF THR BDRVBY. 



WASHINGTON: 



OOTRRNHENT PBINTINO OPPIOB, 



1877. 



vn' 



