546 WHEELER. 



Washington: Seattle (Wheeler); Pullman (W. M. Mann); Mt. 

 Renier (J. C. Bradley). 



Idaho: Boise (A. K. Fisher). 



Arizona: Graham Mts. (E. G. Holt); San Francisco Mts., (A. K. 

 Fisher). 



Colorado: Salida (Wheeler). 



Widely distributed through the Transition Zone from the Pacific to 

 the Atlantic Coast. 



147. Formica fusca var. viarcida Wheeler. 



California: Summit of Angora Peak, near Lake Tahoe, 8650 ft. 

 (Wheeler). 



I have recorded this variety from British Columbia, Alberta, Mani- 

 toba and Washington. It is a small, depauperate, alpine form. On 

 the bare summit of Angora Peak I found it nesting in little craters in 

 spots from which the snow had recently receded (July 26th). The 

 colonies were small and the ants very active. Prof. Bradley took this 

 variety under very similar conditions at Moraine Lake in the Valley 

 of the Ten Peaks, Alberta. The female measures only 6.5 mm. and 

 has the gaster much more pubescent and much less shining than in 

 the typical fusca. 



148. Formica fusca var. subaenescens Emery. 

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

 Previously recorded from California, Washington, Idaho, Utah, 



Colorado, New Mexico, Montana, Alberta, British Columbia and por- 

 tions of the Middle and Atlantic States. 



149. Formica ftisca var. gclida Wheeler. 



Recorded from Colorado, New Mexico, Arizona, California, Oregon, 

 Washington, Alaska, British Columbia, Alberta and Saskatchewan. 



This is an alpine variety, probably the most stenothermal of all 

 the varieties of fusca. In my " Revision " I cited it also from Ontario, 

 Quebec, Labrador, Newfoundland, Nova Scotia, Michigan and New 

 Hampshire, but I have recently shown (Psyche, Dec. 1915, p. 205) 

 that the specimens with this more eastern distribution reaHJ^ consti- 

 tute a distinct variety, which I have described as var. algida. 



150. Formica fusca var. neorvfibarbis Emery. 



British Columbia: Glacier, Field and Emerald Lake (Wheeler). 

 Alberta: Lake Louise, Moraine Lake in the Valley of the Ten Peaks 

 (Wheeler); Jasper (C. G. Hewitt). 



