MAP 29— RANGE OF THE LARGE MEADOW-MICE. 



penns\;hanicus group. 



This map is diagrammatic. Actual records of dru>n7iiondi only are spotted. 



These are chiefly from Vernon Bailey's " Revision," and papers by G. S. Miller, E. A. Preble, W. H. Osgood, O. Bangs, S. N. Rhoads, 

 E. Mollis, E. T. Seton, W. H. Dall, et al. 



The species are: 



Microlus pennivlvanicui (Ord.) with its 6 races, 

 Microtus drummondi (Aud. and Bach.), 



Microlus azlecus f Allen), 

 Microlus enixus Bangs, 

 Microtus lerracnot>ae ( Bangs), 



Microtus breweri (Baird), 

 Microlus ncsophilus Bailey. 



523 



