Occasional Papers of the Museum of Zoology 31 



In Ontonagon County near Gogebic Lake a subadult male was 

 taken September 5 in a large black spruce bog. 



Evotoui\s gappcri gapperi. Red-backed vole. 



Black ash swamp, 2. White pine forest, 2. 



Black spruce — tamarack bog, 6. Wet hardwood forest, 18. 



Arbor-vitae swamp, 2. Dry hardwood forest, 17. 



Hemlock forest, 5. Shrub stage, 5. 



Paper birch — aspen stage. 3. 



Thirty were taken in the Cisco Lake Region, 10 at the Little 

 Girl's Point camp, and 20 near Gogebic Lake in Ontonagon 

 County. It was most common in the forests. Two individuals 

 recorded from the arbor-vitae swamp were taken in a mixed 

 swamp of small arbor-vitae, black spruce, and hemlock with 

 many alders, this situation probably forming a stage in the 

 succession following a beaver meadow. Also, one of the speci- 

 mens recorded from the paper birch — aspen stage was taken in 

 an open stand of old paper birches with a forest floor of grass, 

 conditions not typical of the stage. 



(Jf 13 females examined from June to August, two con- 

 tained 4 embryos each, two 5 embryos each, and two 6 embryos 

 each. August 14, at Little Girl's Point, was the last date on 

 which embryos were found. 



The species is somewhat diurnal. Several times one was 

 seen in daylight about the camp in the Cisco Lake Region, and 

 several were trapped during daylight hours. 



A captive was fond of tender grass blades, but refused the 

 harder stems. In eating he sat up on the hind feet and han- 

 dled the food with the fore feet. 



An immature male taken August 8 near Little Girl's Point 

 had a considerable infestation of seed ticks on the posterior 

 lobes of both ears. 



