J6 14 »9l^ 



3, "^^3^ 



Issued August 3, 1911. 



U. S. DEPARTMENT OF AGRICULTURE 



BUREAU OF BIOLOGICAL SURVEY— Circular No. 82 

 HENRY W. HENSHAW, Chief of Bureau 



THE MAMMALS OF BlT^TERROOT VALLEY, 

 MONTANA, m THEIR RELATION 

 TO SPOTTED FEVER 



BY 



HENRY W. HENSHAW 



Chief, Biological Survey 



AND 



CLARENCE BIRDSEYE 



Assistant, Biological Survey 



100837"— Cir. 82—11 1 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 1911 



