MAP 31— RANGE OF THE MUSKRATS. 



Founded on records by J. Richardson, Audubon and Uachman. D. G. Klliot, C. Hart Merriam, E. A. Mearns, E. A. Preble, R. Mac- 

 Farlane, E. W. Nelson, E. R. Warren, Vernon Hailey, J. Fannin, O. Bangs, R. Bell, W. H. Osgood and E. T. Seton. 

 'I'he map must be considered provisional and diagrammatical. 



The following are recognized: 



Fiber zibelhicus (Linn), with its 6 races. 

 Fiber spatutatus Osgood. Yukon Muskrat, 



Fiber occipitalis Elliott. Oregon Muskrat, 



frier obscurus Bangs. Dusky, or Newfoundland Muskrat, 



Fiber macrodon Merriam. Large-toothed Muskat. 



539 



