202 Merriam The Chipmunks of the Genus Entamias. 



Characters of itie 4 subspecies of Eatamias speciosus. 



Eutamias speciosus (Merriam) is the smallest and shortest-tailed mem 

 ber of the series. In ordinary pelage it is the grayest of the group, and 

 in all pelages the tail is deep rich fulvous above and below, and the fulvous 

 of the upper surface is only partly hidden by the black tips of the hairs. 

 The facial stripes are strongly marked and the post-auricular patches 

 whitish and well defined. 



Eutamias speciosus f rater (Allen) is considerably larger than true specio 

 sus; the fulvous of the sides (below the external -lateral stripe) is brighter 

 and more extensive ; the tail, particularly the upper side, is paler fulvous, 

 the black tip is shorter, and the edges and tips of hairs on the upper sur 

 face are grayish instead of deep yellow. 



Eatamias speciosus inyoensis (nob.) is about the same size as frater and 

 has the longest tail of any member of the group. The black tip of the 

 tail is short, like that of frater, but the fulvous of the upper side is much 

 deeper and richer. The subspecies differs from all others in having the 

 facial stripes less pronounced,, the post-auricular patches indistinct, the 

 back of the neck largely gray, the median dorsal stripe black, and the inner 

 pair of light stripes grayish white. It agrees with callipeplus and differs 

 from all the others in having the rump grizzled golden yellowish instead 

 of gray. 



Eutamias speciosus callipeplus (Merriam) is the largest of the group. It 

 agrees with inyoensis and differs from all the others in the grizzled golden 

 yellow (instead of gray) of the rump, and the unusual amount of bright 

 rufous in the upper side of the tail. The whitish post-auricular patches 

 are larger and more clearly defined, and the yellow edging of the tail 

 more extensive than in any of the others. In the typical form (from Mt. 

 Piiios) the black tip of the tail is short ; in the Sierra form it is long and 

 this is the only difference I am able to detect between the two colonies. 

 We have no specimens from Mt. Piiios in post-breeding pelage, but speci 

 mens in this pelage from the west slope of the Sierra differ from frater in 

 the same pelage in having the post-auricular patches better defined ; the 

 dark facial stripes darker and sharper and the white ones whiter ; the 

 inner pair of light dorsal stripes more obscured by fulvous ; the rump 

 yellower ; the ears longer ; the tail larger and more bushy, edged with 

 deep yellow instead of grayish or pale yellowish, with the upper surface 

 very much deeper and richer fulvous. Eutamias speciosus callipeplus in 

 post-breeding pelage resembles E. quadrimaculatus in corresponding pel 

 age, but differs in smaller size, shorter ears, very much brighter tints ; in 

 smaller, grayer, and less sharply defined post-auricular patches; broader 

 external white dorsal stripes; blacker ant-orbital part of eye stripe; and 

 yellowish instead of hoary tips to the hairs on the upper side of the tail. 



