Occasional Papers of the Museum of Zoology 5 



along the Whitefish River as far as Peter White Camp. A 

 small dam was built across the river during June and July, but 

 it was an ineffective one. Fresh cuttings were found all along 

 the edge of Whitefish Lake and adjacent stretches of the river. 

 The trees cut were small ash. (Plate I, fig. 2.) 



Mils iinisciiliis (LinuKUs). House blouse. — The house 

 mouse occurred about the buildings at Peter White Camp but 

 not in as large numbers as did the Alichigan mouse. 



Pcromyscus iiiaiiiculatits gracilis (LeConte). ^Michigan 

 ]\Iouse. — This mouse was found to be the most abundant 

 mammal of the region. It occurred in large numbers about 

 camp and was taken in all of the habitats in which trapping 

 was done. It was so abundant as to interfere with the trap- 

 ping of other small rodents. 



Bz'ofoiiiys gappcri (V'igors). Red-backed Mouse.— The 

 red-backed mouse is apparently rare in the region and only one 

 specimen was taken. This specimen was found in a root cellar 

 built partly underground near Peter White Camp. 



Microtiis pcnnsylvaniciis (Ord). Meadow Vole. — The 

 vole was not common, but a few were observed in the meadows 

 and two were taken in dead grass at the edge of the river near 

 Peter ^^'hite Camp. 



Ondatra zibethica (Linuceus). Xorthern ]\Iuskrat. — This 

 muskrat is quite common about the lakes and streams in the 

 area studied. It was often seen and heaps of opened clam 

 shells were frequently found. 



Zapns hudsonlns (Zimm.). Northern Jumping ]\Iouse. — 

 This species was not found by the writer but was reported b)- 

 residents as occasionally seen. 



Ercthi.zon dorsatiini (Linn?eus). Canada Porcupine. — 

 The porcupine is still a common species in the region and it 

 was often seen, especially about the salt licks. Two Avere caught 



