PLATE XXXIX. — VOLES. 



a. Evolomys gapperi alhabasca Preble. b. Microltis pennsylvanicus drummondi (Bach.). 



c. Microlus minor (Merriam). d. Synaplomys borealis (Rich.). 



From specimens in collection of Biol. Sun-cy. 

 (.\ll are life size.) 



