VOL. IV.] Notes on a Collection of Mammals. 3 1 7 



Mr. W. E. Bryant for aid of various kinds in the preparation of 

 this paper. The numbers used throughout the paper are the 

 serial numbers of the mammal collection in the University- 

 Museum. 



I. Tarnias quadrvjiaculatus Gray. 



This species, of which six specimens were taken, was found 

 only at two localities, Summit Station and on Mt. Tallac, They 

 are all in worn pelage, having not yet attained their fall coat, but 

 all show on the flanks, patches of rich ferruginous that cannot be 

 mistaken. The series varies somewhat in intensity of color, 

 although they were all collected within a period of three weeks. 

 Two specimens, No. 51, a male, taken July 31, and No. 97, a 

 female, taken August 12, on Mt. Tallac at about 8500 feet eleva- 

 tion show the highest coloration. In one specimen. No. 66, a 

 male, nearly all the outer coat has been shed, leaving the soft 

 black under pelage, through which the new hairs of the stripes 

 are beginning to show. 



Little is known of either the horizontal or vertical distribution 

 of this species. It is considered by Dr. Allen a Sacramento Valley 

 form, and is recorded from the following localities: Nevada City, 

 Nevada County; Fort Crook, Shasta County; Baird, Shasta 

 County; Mt. Shasta, Lassen County; and from Fort Klamath, 

 Oregon. As is readily seen, none of these localities are in the 

 Sacramento Valley. They are all in the lower portion of the 

 pine belt which covers the western slope of the Sierras down to 

 an altitude of about 1500 feet in the Mt. Shasta region and to 

 about 2500 feet in Central California. The discovery by 

 the writer that Tamias quadrimaculatus inhabits the upper slopes 

 of Mt. Tallac was unexpected, and goes to show that from 

 Nevada City northward this species probably inhabits the entire 

 western slope of the Sierra down to the limit of evergreen forests. 

 Its extension southward is still unknown. 



Gray's type of Tamias quadriniaculahis came from Michigan 

 Bluff, which stands at an elevation of 3500 feet, some fifteen 

 miles in a direct line due south of Blue Canon, and about half 

 that distance from Red Point. Th^ three localities present simi- 

 lar conditions, standing at approximately the same elevation, 

 and all included in the great belt of yellow and sugar pine. 



