Occasional Papers of the Museum of Zoology 35 



streams through the forests are evidently made mostly by 

 these animals. It is detested by the inhabitants of the region, 

 chiefly for the damage done to any woodwork which contains 

 the least amount of salt. 



Porcupines spend a considerable amount of time inside hol- 

 low linden, yellow birch, and hemlock trees, as shown b\- the 

 large piles of droppings noted at the lower openings of numer- 

 ous such hollow trees. 



June 30, and again on July 2, young individuals were closely 

 observed while feeding on the leaves of the yellow water lily. 

 These individuals were on the logs in an overflow swamp, and 

 they reached down with a fore foot into the water to secure 

 the food, which was then presented to the mouth with the 

 same foot. One of these porcppines seemed to be very dis- 

 inclined to wet his feet, except the fore feet in reaching for 

 food; the other individual waded out on a log which was sub- 

 merged several inches, but he showed a ludicrous determina- 

 tion to hold the tail up out of the water. 



A juvenile weighing only 914 grams was taken as late as 

 July 21 at Fish-hawk Lake, but no embryos were found in 

 the period between June 29 and September 3. It is often 

 active throughout the day as well as in the night. 



A young individual taken in a trap July 3 was found sur- 

 rounded by a swarm of mosquitoes, which seemed to annoy 

 him considerably, for he shook his skin frequently to dislodge 

 them. One mosquito settled on a lower eyelid as we watched, 

 and others kept alighting on his nose. When he raised his 

 quills on our approach many mosquitoes attacked the skin 

 exposed on the back. 



Mannota uiona.v canadensis. Canada Woodchuck. 

 Hemlock forest, 5. Shrub stage, 9. 



A few occur in the Cisco Lake Region, where they are most 



