MAMMALS FROM BEAVER COUNTY, UTAH. COLLECTED 

 BY THE MUSEUM EXPEDITION OF 1904. 



BY J. A. ALLEN. 



American Museum of Natural History. 



During the summer of 1904 Mr. George P. Engelhardt, of the 

 Museum of the Brooklyn Institute of Arts and Sciences, made a col- 

 lecting trip to Southwestern Utah, mainly for insects, but he collected 

 also much other natural history material, including about 75 mammals, 

 representing 16 species, which have been referred to me for 

 identification. 



The mammals, which have proved of special interest, were obtained 

 partly on the sagebrush plains and in the foothills of the Beaver Range 

 Mountains, at altitudes of from 5,500 to 6,500 feet, and partly at alti- 

 tudes of 9,000 to n,ooo feet on Belknap Peak, the highest point of the 

 Beaver Range. This range is about fifty miles long, and rises to a 

 height of 13,000 feet, timber line being at about 12,000 feet. The 

 range is isolated from other ranges by desert areas, the nearest range 

 on the north being about forty miles distant. As shown by the species 

 recorded below, a number of types occur at Briggs Meadows on 

 Belknap Peak, that must have been isolated from their next of kin for 

 a very long period, even geologically speaking, and plainly show the 

 effects of isolation and unusual environment. This is shown especially 

 by the presence of colonies of Picas and Marmots, and of species of 

 Eutamias and Putorius, quite different from the species of the foothills. 



i. EUTAMIAS LECTUS sp. nov. 



Type, No. 385, Mus. Brooklyn Inst. Arts and Sciences, Beaver Valley, Beaver 

 County, Utah, July 25, 1904 ; George P. Engelhardt. 



Postbreeding Pelage. Similar in size to E. pictus, but tints all much 

 stronger; flanks much brighter, deep rufous, extending forward to include the 

 shoulders and sides of the neck, which in pictus are gray with a slight tinge of 

 fulvous; dark face stripes darker and broader and light stripes narrower; post- 

 auricular white patch gray instead of white, much more restricted and less con- 

 spicuous ; central area of lower surface of tail bright rufous instead of pale 

 fulvous. 



198485 



