Il8 BROOKLYN INSTITUTE MUSEUM. SCIENCE BULLETIN I IJ 5. 



Breeding Pelage. A single female in worn breeding pelage has lost most of 

 the rufous tint on the flanks and sides of the neck, the ground color above is 

 grayer, and the dark dorsal stripes are blacker, through the fading of the rufous 

 suffusion seen in freshly moulted specimens. This specimen bears a close re- 

 semblance in coloration to Eutamias cinereicollis, but its very small size distin- 

 guishes it at once from that species. 



There are no flesh measurements, but the size, as shown by the length of the 

 hind foot and the skull, is practically the same as in E. pictus. The feet, how- 

 ever, appear narrower and slenderer. 



Represented by 6 specimens, all but one in postbreeding pelage, and possibly 

 young of the year, but the dentition and skull show full maturity. All were 

 taken in Beaver Valley, Beaver County, August 25. 



Eutamias lectus is a geographical representative of E. pictus, differ- 

 ing from it mainly in its more intense coloration throughout, and espe- 

 cially in the rufous of the flanks extending to the sides of the neck, 

 and in the rufous instead of pale fulvous under surface of the tail, so 

 that on comparison of specimens of the same age and season, either 

 singly or in series, the difference in coloration is striking: 



2. EUTAMIAS ADSITUS sp. nov. 



Type, No. 452, Mus. Brooklyn Inst. Arts and Sciences, Briggs Meadows, Beaver 

 Range Mountains, Utah (alt. 10,000 ft.), August 20, 1904; George P. 

 Engelhardt. 

 Postbreeding Pelage. Similar to E. lectus in coloration but much larger ; 



hind foot 31 (28 in lectus) ; skull, total length, 35 (30.5 in lectus) ; width of 



braincase, 17 (15 in lectus). 



Represented by a single specimen (adult) taken at an altitude of 

 10,000 feet in the Beaver Range Mountains. While resembling E. 

 lectus in coloration, the skull is fully one-third larger (in general bulk), 

 and the feet and other external measurements are proportionally 

 greater. Probably its nearest ally is Eutamias umbrinus, of the Uintah 

 Mountains. 



Unfortunately Mr. Engelhardt secured only one specimen of this 

 interesting form, which he naturally supposed was the same species as 

 that taken in Beaver Valley, described above as Eutamias lectus. He 

 informs me that he did not notice any striped squirrels, in ascending 

 the mountains, between the foothills region and Briggs Meadows, at 

 an altitude of 10,000 feet. Here, he says, "I observed about six of these 

 animals one afternoon among a pile of rocks two miles distant from 

 our camp. I shot one, mutilating it greatly. From general resemblance 

 to the valley species I took it to be the same and made no further efforts 

 to get more." 



