292 Warren, Birds of the Elk Mountain Region, Colo. [ju"y 



now be held of specific value, as no intermediate specimens are • 

 forthcoming." It remained for M. Johan Beetz to point out the 

 fact that there is an intermediate form between drcsseri and borcalis. 

 Instead of this form. being a new species, as M. Beetz suggests, it 

 seems to me, however, that his important discovery shows that 

 drcsseri intergrades with borcalis, and that like horcalis it should 

 be classed as a subspecies of moUissima. If this view is accepted 

 this Eider should be reduced from its specific station and be listed 

 as Somateria molUssima drcsseri. A study of the breeding Eiders 

 about Hamilton Inlet, the supposed dividing line between the 

 ranges of borcalis on the north and dresserii on the south, would be 

 of interest.— C. W. T. 



NOTES ON THE BIRDS OF THE ELK MOUNTAIN 

 REGION, GUNNISON COUNTY, COLORADO. 



BY EDWARD R. WARREN. 



Plates XVI-XVIII. 



The region covered by the following notes is the northwestern 

 portion of Gunnison County, which is in the western third of the 

 State, about midway between the north and south boundaries. 

 The county is of irregular shape, and the easterly boundary is the 

 Continental Divide, with several summits attaining an elevation 

 of more than 14,000 feet above sea level. The Elk Mountain 

 Range branches from the Divide with a somewhat northwesterly 

 trend, and forms the northerly boundary as far as Snow Mass Peak, 

 whose elevation is 13,970 feet, and whence the line runs due west 

 over an exceedingly rough country, as the writer can testify from 

 personal acquaintance, to the Huntsman's Hills, a comparatively 

 low divide; thence northwesterly along the Hills to intersect the 

 summit of the Grand Mesa, which also forms a part of the bound- 

 arv for a short distance. The west boundary of the Comity is the 



