164 NORTH AMEEICAN FAUNA [No. 55 



Their homes and nests are generally in hollow trees and, where 

 these are not available, in masses of moss or old leaf nests of other 

 squirrels, or in moss and leaf and twig nests built by themselves in 

 forks or branches of trees. At Gold Beach, McLellan found one 

 occupying a small spherical nest of sticks and moss in the branches 

 of a fir tree, and some of the many nests examined in the tops of 

 conifers undoubtedly belong to them instead of other squirrels. 



The females have 4 pairs of mammae 1 inguinal, 2 abdominal, 

 and 1 pectoral and the young are probably 3 to 6 in number, as in 

 closely related forms. 



The food of this form is not well known but like others of the 

 group it undoubtedly includes a varied list of nuts, seeds, fruit, 

 insects, and meat. Traps baited with rolled oats, bread, nuts, grain, 

 or a bunch of cotton will catch them wherever they are common. 



Economic statm. On rare occasions these squirrels get into attics, 

 barns, or storehouses and do slight mischief, but generally they are 

 scarce about buildings or in the open, where cats and owls prey upon 

 them. Usually they are quite harmless and, although rarely seen, 

 form an interesting feature of the forest wildlife. 



GLAUCOMYS SABRINUS FULIGINOSUS (RHOADS) 

 CASCADE FLYING SQUIRREL 



Sciuropterus alpinus fuliginosus Rhoads, Acad. Nat. Sci. Phila. Proc., p. 321, 

 1897. 



Type. Collected in Cascade Mountains at 8,000 feet near Martin Station, 

 Kittitas County, Wash., by Allan Rupert, March 1893. 



General characters. Slightly larger than oreponensis, and lighter brown. 

 Upper parts washed with pale brown over plumbeous; tail sooty toward tip; 

 eyering dusky; cheeks gray; lower parts soiled whitish or buffy. Immature 

 specimens duller and darker. 



M easurements. Total length, 308 mm; tail, 144; hind foot, 41; ear (dry), 19. 



Distribution and habitat. These squirrels inhabit the Cascade 

 Eange from southern British Columbia south through Washington 

 and Oregon into the Siskiyous of northern California (fig. 31). 

 Specimens have been taken in Oregon at Vida, McKenzie Bridge, 

 Belknap Springs, 20 miles west of Crescent Lake, Fish Lake, and 

 Crater Lake, all in the coniferous forest of the Cascades. 



General habits. At Crater Lake Preble caught one in a trap set at 

 the base of a dead stub in open woods about a quarter of a mile south 

 of the crater run. At Vida on the upper part of McKenzie River, 

 Luther Goldman caught one in a trap set under a log in the spruce 

 woods and baited with rolled oats and a bit of sausage. At Mc- 

 Kenzie Bridge, farther up the river, a few specimens were taken in 

 the heavy forest of conifers, alders, ash, and maples. The trunks 

 and branches of maple and ash trees were heavily laden with tree 

 mosses, great cushions, sheets, and streamers of deep soft old fleeces 

 in which the flying squirrels had their nests and under which they 

 had well-worn trails up the trunks and along the larger branches. 

 The nests were well-lined cavities made in the middle of some hang- 

 ing or resting masses of this soft moss where no hollow trees were 

 available. A trap set at the bottom of one of these nest trees and 

 baited with rolled oats and bits of cracker with a watermelon seed 

 on the trigger caught an old flying squirrel the first night. 



