1895.] NATURAL SCIENCES OF PHILADELPHIA. 243 



.it ions of americanus east of the Rocky Mountains by its grayness 

 and almost total lack of rufous above. From the Kooky Mountain 

 and east Cascade form which, for present purposes, may be called 

 bairdi, the color of the feet is a distinguishing character, while, as 

 compared with washingtoni, the differences in color and size are ob- 

 vious enough to need no comment. 



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