MAP 24— RANGE OF THE NORTH AMERICAN FLYING-SQUIRRELS. 



This map is founded chiefly on the records by J. A. Allen, Audubon and Hachman, C. Hart Merriam, John Richardson, S. 

 C. H. Townsend, John Fannin, A. P. Low, O. Bangs, W. H. Osgood, V. liailey, Edward A. Preble. 



It must be considered diagrammatic and provisional. All the North .\merican species are entered. 



N. Rhoads, 



Scluroplerus sabrinus (Shaw), with 4 races, 

 Sciuroplerus oolans (Linn.), with 2 races. 



Scluroplerus alpinus (Richardson), with 10 races, 

 Sciuroplerus yukonensis Osgood. 



439 



