130 NOETH AMERICAN FAUNA [No. 55 



EUTAMIAS TOWNSENDII OCHROGENYS MEBBIAM 



REDWOOD CHIPMUNK 

 Eutamias townsendi ochrogenys Merriam, Biol. Soc. Wash. Proc. 11 : 195, 1807. 



Type. Collected at Mendocino, Calif., by J. E. McLellan in 1894. 



General characters. Distinguished from typical townsendii by its rich rusty 

 yellow lower parts, and more contrast in lighter summer, and darker winter 

 pelage ; tail the same as in townsendii. Size about the same. 



Measurements. Average of adults : Total length, 265 mm ; tail, 116 ; foot, 38 ; 

 ear (dry), from notch, 17. 



Distribution and habitat. The redwood chipmunks occupy a nar- 

 row coastal strip from Port Orford, Oreg., south to Bodega Bay, 

 Calif. There are Oregon specimens from Port Orford, Gold Beach, 

 State Line, and the Rogue River Mountains about 18 miles back 

 from the coast. To the north they apparently grade into Eutamias 

 townsendii and to the east into the siskiyou form (fig. 21). They 

 are found mainly in the redwoods of the coast region of northern 

 California and extend slightly beyond them in Oregon, in the coast 

 division of Transition Zone. 



General habits. In voice, actions, and habits, generally, these 

 chipmunks are not noticeably different from typical townsendii. In 

 the redwood forests where they climb over the logs and trunks of the 

 great trees, they find the deepest shade and richest colors of any 

 forest in the country, and have taken on similar rich coloration for 

 their own protection. In the deep forest shadows they would be lost 

 but for their shrill, whistling chipper, or the slow chuck, chuck, chuck^ 

 and the graceful waving from side to side of the plumy tails as they 

 sit on points of brown bark or against the huge trunks. 



Their food includes a wide range of nuts, seeds, berries, fruits, 

 plants, and insects found in the southern part of the State, as well 

 as the nuts of the tanbark oak and California buckeye, 



EUTAMIAS TOWNSENDII SISKIYOU HOWELL 

 SISKIYOU CHIPMUNK 



Euta/mias townsendii siskiyou Howell, Jour. Mammal. 3 : 180, 1922. 



Type. Collected in Siskiyou Mountains, Calif., near summit of White Moun- 

 tain at 6,000 feet, by N. Hollister, in 1909. 



General characters. Slightly smaller than Eutamias townsendii and much 

 paler; nearest to E. t. senex, but showing gradation toward E. t. ochroffenys, 

 and evidently grading into both of these forms as well as into E. t. cooperi. 

 Summer pelage, back with 1 black and 4 brown stripes and 4 gray stripes 

 (pi. 27, A) ; sides of head with 2 gray and 3 brown stripes ; sides grayish brown ; 

 tail almost as in typical townsendii; spot back of each ear light gray; lower 

 parts lightly washed with ochraceous. Winter pelage duller, darker, and 

 grayer than in summer. 



Measurements. Average of adults : Total length, 255 mm ; tail, 110 ; foot, 36.5 ; 

 ear (dry), 16.6. 



Distribution and habitat. This chipmunk is found in the Siskiyou 

 Mountains of northwestern California and southwestern Oregon, 

 and the Rogue River spur of the Cascades west of Crater Lake, in 

 Transition Zone, and also in the limited areas of Canadian on the 

 Siskiyous (fig. 21). Its range is more open and less humid than 

 that of townsendii or ochrogenys, but less so than that of senex. 



