_Glaucomys sabrinus macrotis._ Mearns Flying-squirrel. Black ash swamp, 1. Hemlock forest, 1. Wet hardwood forest, 2. Dry hardwood forest, 1. Two were taken in the Cisco Lake Region and three near Gogebic Lake in Ontonagon County. A female taken July 4 near Fish-hawk Lake was still suckling young, and contained no embryos, but a female taken July 6 in the same region contained five small embryos. An immature female taken August 27 near Gogebic Lake was without embryos. _Castor canadensis michiganensis._ Woods Beaver. Leather leaf bog, house. Two houses were found in the Cisco Lake Region, both being in leather leaf bogs near deep water. Around the house studied there was an incomplete moat connected with a channel leading to deep water, and canals and tunnels radiated out through the bog. No beavers were observed nor secured, but fresh cuttings were noted at the edges of some of the "forms" in the bog. A few beaver are reported to occur near Little Girl's Point and near Gogebic Lake. E. E. Brewster in 1895 wrote Dr. Gibbs that it was not uncommon in Gogebic County and in probably all the counties of the Upper Peninsula where trapping and lumbering had been discontinued; he stated that beaver were appearing again even in localities where formerly most sought. In 1911, J. E. Marshall reported it scarce near Gogebic Lake. _Lepus americanus phæonotus._ Snowshoe Hare. Forest--shore, 1. Arbor-vitae swamp, signs. Leather leaf bog, signs. Black spruce--tamarack bog, 1. Wet hardwood forest, signs. Dry hardwood forest, 1. Shrub stage, 7. Paper birch--aspen stage, 1. Cultivated-field, 1. Edificarian, 1. Rare during the season of 1920 in the areas visited. In the Cisco Lake Region an adult female was taken in a trap set for muskrat under water on a brushy point. Other hares were occasionally seen in the evenings in the shrubby clearing around the camp house; and one was even seen on the porch. Droppings were found in a leather leaf bog, and a hare was seen at the edge of a black spruce--tamarack bog. Near Little Girl's Point a juvenile was taken August 13 in the upland hardwood forest, but was partly eaten in the trap by some carnivore; several were seen in shrubby clearings; and a young one was reported captured in an oat field by a farmer. Droppings were found in an arbor-vitae swamp. Near Gogebic Lake in Ontonagon County droppings were found in wet hardwood forest, in a thick growth of aspen and white birch saplings, and in an extensive tamarack bog. An adult female taken July 4 at Fish-hawk Lake had much milk in the mammae. At the camp on Lindsley Lake June 27 one was seen to eat some wood ashes; and June 30 one was seen to feed on the blades of quack grass (_Agropyron repens_), which was identified by E. A. Bessey. _Odocoileus virginianus borealis._ Northern White-tailed Deer.