CAPPER'S RED-BACKED MOUSE 



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brown above and grayish underneath. The species most 

 common in the eastern United States, often called Gapper's 

 Field Mouse, is found westward to the Rocky Mountains. 

 It is S^ inches in length of head and body; tail, IM inches. 



GAPPER'S RED-BACKED MOUSE. 



In scientific lists of the mammals of North America, Red- 

 backed Mice are sometimes called Red-Backed "Voles." 



The Voles of the genus Phe-nac'o-mys, are small brown 

 mice, mostly of recent discovery, about the size of the red- 

 backed mouse, in color usually dark brown mixed with black. 

 Nine species are known, extending in range from Labrador 

 westward to Oregon, Washington, and northern British Co- 

 lumbia, and also down to Colorado. None are found in the 

 eastern half of the United States. There is no special mark 



