MAP 13— RANGE OF THE NORTH AMERICAN RED-SQUIRRELS. 



This map is founded chiefly on Dr. T. A. Allen's Revision of the Chickarees {1898), with assistance from the records by O. Bangs, 

 R. Macfarlane, E. W. Nelson, Audubon and Bachman, S. N. Rhoads, G. S. Miller, C. Hart Merriam, W. H. Osgood, E. A. Preble, 

 E. T. Seton. ..... „ , 



It must be considered diaierrammatic and provisional. The facts are not yet available to make an absolute map of distnbution. tor the 

 sake of clearness the ranKes are shown as though quite separate; they doubtless overlap. 



The three species are : Sciurus douglasi Bach., with 5 geographical races. 



Sciurus huJionicus Erxl., with 10 geographical races. Sciurus fremonli Aud. & Bach., with 4 geographical races. 



309 



