154 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. III. 



Color. Upper parts, rump and sides of body uniform, very 

 dark ochre; tops of head and nose mixed black and ochraceous; 

 five black dorsal stripes, the middle one running from occiput to 

 root of tail; space between stripes slightly paler than body color; 

 face stripes and center of nose black; sides of face ochraceous; 

 postauricular spot grayish white, conspicuous; under parts white, 

 plumbeous of under fur showing through; tail above dark ochra- 

 ceous at base, with black hairs intermingled, rest black, the hairs 

 tipped with white, their bases reddish ochre; beneath dark ochre 

 at base, rest reddish ochre with black lateral band fringed exter- 

 nally with white; tip black, edged with white; hands and feet pale 

 grayish buff; ears black, with broad external band including tip 

 grayish white, external basal edge ochraceous. 



Measurements. Total length, 262; tail vertebrae, 115; hind 

 foot, 37; ear, 23. Skull: occipito-nasal length, 38; Hensel, 30; 

 zygomatic width, 21; interorbital constriction, 8.5; length of 

 nasals, n; palatal length, 16; length of upper tooth row, 6; 

 length of mandible, angle to alveolus of incisor, 16. 



This form of chipmunk is allied to T. t. ochrogenys Merr. , from 

 Mendocino and the coast of California and Oregon to the Rogue 

 River. The pelage described above is that of winter, and differs 

 from that of T. t. ochrogenys in the absence of gray dorsal stripes, 

 different color of the upper parts, the presence of the anteorbital 

 face stripe, absent in T. t. ochrogenys at all seasons, and the absence 

 of buff on the under parts. It agrees with the subspecies com- 

 pared in having the sides of the head ochraceous. From T. t. 

 hindsi it differs in being much larger, has not the reddish color- 

 ing characteristic of that form, absence of pale dorsal stripes, 

 and the presence of the ochraceous cheeks; and from T. to-n<n- 

 sendi in an entirely different coloring and no gray stripes. It 

 seems to replace T. t. ochrogenys on the Oregon coast, north of 

 Goldbeach. All the specimens were taken in November and 

 December, so I do not know what the breeding pelage would be, 

 or if there would be any gray dorsal stripes at that season. I 

 have before me T. t. hindsi at all times of the year exhibiting 

 the different phases of pelage, and none of them agree with 

 the specimens of this form. Dr. Merriam intimates that T. /. 

 ochrogenys is never white on the under parts, when he says, com- 

 paring it with T. toivnsendi, that "it differs in all pelages by color 

 of under parts, which is always white in townsendi," so I infer that 

 these examples can not be the winter pelage of T. t. ochrogenys, 

 especially as that form, both in breeding and postbreeding pelages > 



