The Chipmunks of the Genus Eutamias. 197 



post-breeding pelage. The hairs of the upper side of the tail have a broad 

 median band of fulvous which shows through in both pelages, giving the 

 tail a rich fulvous glow not present in the other members of the series 

 except and to a less extent in townsendi in post-breeding pelage. 



Range. Wooded or brushy hills of northern California west of the 

 Sacramento Valley and north of San Francisco Bay. Northern limit of 

 range unknown. Specimens have been examined from Nicasio north 

 ward to Sherwood, Cahto, and the head of Eel River. On the west the 

 range of hindsi joins that of ochrogenys. 



Eutamias merriami (Allen). Merriam's Chipmunk. 



General characters. Tail very long ; ear stripes and post-auricular spots 

 not sharply defined and not conspicuous ; under parts white ; general 

 color of upper parts grayish in winter pelage, fulvous in summer pelage ; 

 outer pair of light stripes whitish and always conspicuous ; dark dorsal 

 stripes obscured by fulvous-tipped hairs, the median one only showing 

 any clear black ; sides of face never washed with yellowish or ochraceous ; 

 median facial stripe continuous in front of eye, usually dusky, bordered 

 on both sides by fulvous ; inner pair of pale dorsal stripes grizzled grayish. 



Range. Brush-covered slopes of the Upper Sonoran and Transition 

 zones in southern California from the Cuyamaca, San Jacinto, and San 

 Bernardino Mts. northward in the coast ranges to San Francisco Bay, and 

 along the west slope of the Sierra to the Yosemite Valley. In the San 

 Bernardino Mts. merriami occurs as far west as Wilson Peak, beyond 

 which it is separated by a considerable gap from Mt. Pifios, where it is 

 abundant. Owing to the low altitude it inhabits, its range is practically 

 continuous around the southern end of the San Joaquin Valley, speci 

 mens having been collected on Tehachapi Mt. and at Havilah near 

 Walker Basin. The colonies inhabiting the Cuyamaca, Smith, San 

 Jacinto, and San Bernardino Mts. are isolated. The form inhabiting the 

 coast strip between Santa Cruz and San Francisco Bay is a little more 

 highly colored than the typical animal, and has been named pried. 



KEY TO MEMBERS OF TOWNSENDI GROUP IN ALL PELAGES. 



Ear stripes and spot behind ear well defined ; tail not exceed 

 ingly long. 



Under parts white (not washed with fulvous). 



Upper parts (excepting stripes) of uniform color from 

 post-auricular spots to tail. 

 Color yellowish olive-gray (winter pelage) or dull 



yellowish fulvous (post-breeding pelage) townsendi. 



Upper parts not of uniform color. 



Rump grizzled gray ; tail small, narrow, dull ful 

 vous below senex. 



Rump grizzled golden-brown; tail large and 

 bushy, deep chestnut below hindsi. 



40Rioi,. Soc. WASH., VOL. XI, 1897 



