128 



NORTH AMERICAN FAUNA. 



[no. 39. 



Washington: Blue Creek (13 miles east of Walla Walla), 3; Chelan, 2; Cheney, 

 1; Colfax, 1; Columbia County (25 miles southeast of Dayton and Humpeg 

 Falls), 2; Colville, 6; Davenport, 1; Douglas, 2; Easton, 9; Fort Spokane, 1; 

 Garfield, 1; Loon Lake, 2; Mabton, 3; Marcus, 5; Marshall, 11; Natches 

 River, 1; North Yakima, 22; Orondo, 1; Pullman, 11; Rock Lake, 2; Spo- 

 kane Bridge, 3; Spokane Falls, 15; Waterville, 1; Wenatchee, 8. 



Wyoming: Black Mountains, 4; Moran, 4; Pahaska, 4; Pahaska Tepee. 12; 

 Teton Mountains, 6; Teton Pass, 4; Yellowstone Lake, 1. 



THOMOMYS FUSCUS SATURATUS Bailey. 

 CcEUR D'Alene Pocket Gophee, 



(PI. VIII, fig. 16.) 



Thomomys fuscus saturatus Bailey, Proc. Biol. Soc. Washington, XXVII, 117, July 

 10, 1914. 



Type. — Collected at Silver (near Saltese) in the western corner of 

 Missoula County, Montana, at 4,300 feet altitude, in the Coeur d'Alene 

 Mountains, by Clark P. Streator, June 20, 1891. Type specimen in 

 U. S. Nat. Mus., Biological Survey collection. 



Distribution. — Higher parts of the Coeur d'Alene Mountains in 

 Idaho and Montana (fig. 5) . 



CJiaracters. — Considerably larger than fuscus, with darker, richer 

 coloration and less tendency to white markings below; skull long and 

 high, with relatively narrower braincase and wider nasals. 



Color. — Summer pelage: Upperparts dark rich hazel, becoming yel- 

 lowish on sides, and this shading into a huffy wash on underparts; 

 ear patches black; nose plumbeous; feet and tail huffy gray; rarely 

 a trace of white on chin or throat. Only June and August specimens 

 seen. The young are a shade paler than adults. 



Slcull. — Long and narrow with high, truncate occiput; lateral 

 ridges prominent and nearly parallel; nasals widened anteriorly and 

 emarginate posteriorly; premaxillse very narrow posteriorly; bullse 

 wide and flattened; basioccipital relatively wide between buUse. 



Measurements. — Type ( ad.): Total length, 225; tail vertebrae, 

 77; hind foot, 30. Average of 3 adult males: 216, 72, 29. Average 

 of 5 females: 211, 75, 28.7. Slull (of type): Basal length, 33.2; 

 nasals, 13.7; zygomatic breadth, 21.4; mastoid breadth, 17; alveolar 

 length of upper molar series, 7. 



RemarTcs. — This seems to be a well-marked but rather local form 

 of \h.Q fuscus group occupying the higher hemlock-covered part of the 

 Coeur d'Alene Mountains. Specimens from Prospect Creek, lower 

 down on the east slope, show intermediate characters approaching 

 fuscus while others from Thompson Falls, at the east base of the 

 mountains are almost typical oi fuscus. 



Specimens examined. — Total number, 26, as follows: 

 Idaho: Mullan, 3. 



Montana: Prospect Creek, 6; Silver, 16; Thompson Pass, 1. 



