MOUNTAIN ANTS OF NORTH AMERICA. 545 



Montana: Beaver Creek, 6300 ft. (S. J. Hunter). 

 Previously recorded only from Colorado. 



143. Formica ulkei Emery. 

 Manitoba: Treesbank (C. G. Hewitt). 



Recorded from South Dakota, Illinois, Nova Scotia and New 

 Brunswick. 



144. Formica fusca L. 



British Columbia: Field and Emerald Lake (Wheeler). 



Alberta: McLeod and Jasper (C. G. Hewitt) ; Lake Louise, Moraine 

 Lake in the Valley of the Ten Peaks, and Banff (Wheeler). 



Manitoba: Aweme (N. Criddle). 



Washington: Mt. Renier (J. C. Bradley). 



California: Kern Lake (J. C. Bradley); Lake Tahoe, 6200-9000 ft. 

 (Wheeler); Camp Curry and Glacier Point, Yosemite, 4000-8000 ft. 

 and Muir Woods, Mt. Tamaplais (Wheeler). 



Arizona: San Francisco Mts., 12,000 ft. (W. M. Mann). 



Colorado: Creede, 8844 ft. (S. J. Hunter); Chimney Gulch, Golden 

 14,000 ft.; Bulhon Peak, Park County, 14,000 ft.; Clear Creek, Jeffer- 

 son County, 9500 ft. and Wilson's Peak, 12,000-14,000 ft. (E. J. Oslar). 



Montana: Flathead Lake (C. C. Adams); Beaver Creek, 6300 ft. 

 (S. J. Hunter). 



Wyoming: Yellowstone National Park (J. C. Bradley). 



In my " Revision" I have given a long list of localities of this species, 

 which is the most eurythermal and therefore the most widely distrib- 

 uted of all the species of Formica in North America as well as in Eurasia. 

 In the Western States it varies considerably in size and pubescence 

 and in the coloration of the legs and antennae, but I deem it inex- 

 pedient to give these varieties names at the present time. Many of 

 them seem to represent transitions between the typical form and the 

 following four varieties: 



145. Formica fusca var. subsericea Say. 



I am not sure that this form occurs in the Western States. Speci- 

 mens referred to this variety on account of their more abundant 

 pubescence are cited from Arizona and Colorado in my " Revision." 



146. Formica fusca var. argentea Wheeler. 

 Oregon: Ashland (W. Taverner). 



California: Angora Peak near Lake Tahoe, 7500-8600 ft. (Wheeler). 



