1936] MAMMALS OF OREGON 117 



Falls, and by Luther J. Goldman from the Paulina Mountains, also 

 may be this form (fig. 18). 



General habits. From other forms, the dusky conies differ only 

 in adaptation to their peculiar habitat, dark lava rocks and a humid 

 climate, the two factors that seem to have produced the dark- 

 colored race. They live under and among the rocks, run over the 

 rough surfaces with their well-cushioned feet, or sit still and invisi- 

 ble at their dark doorways. The shade of more or less dense vege- 

 tation around the edges of the rock slides where they gather their 

 food conceals and protects them from hungry and keen-eyed ene- 

 mies. 



At the base of the Three Sisters one very small young was taken 

 the middle of July, but generally the young were not yet appear- 

 ing at the surface of the rocks and the old conies were keeping 

 very quiet. 



Their winter stores of food seem to include most of the plants 

 within reach of their homes, but only the left-over refuse has been 

 examined, and the species of plants have not been listed. 



A marten caught in a trap set for mountain beaver had its stomach 

 well filled with cony fur and in other places martens have been 

 found hunting them. As a source of marten food conies may have 

 a greater value than some more conspicuous game animals. 



ORDER RODENTIA: GNAWING MAMMALS 



Family SCIURIDAE: Squirrels, Chipmunks, and Woodchucks 



SCIURUS GRISEUS GRISEUS ORD 



SILVER GRAY SQUIRREL; COLUMBIAN GRAY SQUIRREL; CUDON of the Wasco at 



The Dalles 



Sciurus griseus Ord, Jour. Phys. 87: 152, 1818, from description by Lewis and 

 Clark. 



Type locality. The Dalles, Oreg. No type specimen. 



General characters. Large (pi. 26) ; tail very long and plumose; ears rather 

 long, not tufted. Upper parts clear bright gray, much frosted by white-tipped 

 hairs; tail gray above and below, edged and tipped with white beyond an obscure 

 zone of concealed black; top of feet dark gray; back of ears rusty brown; 

 whole lower parts, except tail, white. Color essentially the same at all sea- 

 sons; fur short and harsh in summer, full and soft in winter pelage. 



Measurements. Total length, 570 mm; tail, 270; hind foot, 82; ear (dry), 

 from notch, 28. Weight: Grinnell and Storer give the weight as 26 to 32 

 ounces. (1924, P- 196.) 



Distribution and habitat. These great tree squirrels occupy the 

 Transition Zone forests of western Oregon on both sides of the 

 Cascade Kange, and extend northward to Puget Sound and south- 

 ward through the Sierra Nevada of California (fig. 19). In places 

 they reach the coast but are more common in the interior valleys 

 with the oaks, maples, yellow pines, and sugar pines. 



General habits. Usually much hunted and among the shyest of 

 wild game, these handsome squirrels are rarely seen except where 

 given special protection, which they are quick to recognize and to 

 which they respond with full confidence. In a few Oregon towns 

 they occupy the much-frequented parks and become as fearless as 



