MOUNTAIN ANTS OF NORTH AMERICA. 523 



Bradley); \Yhittier and Azusa (W. Quayle); Yosemite and Lake 

 Tahoe* (Wheeler). 



Washington: "Throughout the state" (W. M. Mann). 



Idaho: Market Lake (J. M. Aldrieh). 



Nevada: King's Canyon, Ormsby Co. (C. F. Baker). 



Colorado: Ward 9000 ft. (T. D. A. Cockerell); Buena Vista, Salida, 

 Colorado Springs, Florissant and Boulder (Wheeler) ; Eldora, 8600 ft. 

 and Swift Creek, (W. P. Cockerell) ; Creede Co. 8844 ft. (S. J. Hunter); 

 Tolland and Boulder, 5000-10500 ft. (W. W. Robbins). 



New Mexico: Las Vegas (Wheeler); Harvey's Ranch, Las Vegas 

 Range, 10,000 ft. (Ruth Raynolds); Manzanares (Mary Cooper); 

 Pecos and Albuquercjue (T. D. A. Cockerell). 



Arizona: Grand Canyon (Wheeler); Huachuca Mts., 5000 ft. 

 (Biedermann and Wheeler). 



Texas: Jefferson (E. S. Tucker). 



Montana: Flathead Lake (C. C. Adams). 



British Columbia: Golden (W. Wenman); Emerald Lake (W^heeler). 



Alberta: Banff (Wheeler). 



This ant is equally abundant and widely distributed in the whole 

 region between the area covered by this list of localities and the Atlan- 

 tic sea-board. It is an essentially eurythermal species, always nesting 

 under stones, logs or bits of wood in open places. The large number of 

 specimens which I have accumulated show considerable variations in 

 size and coloration and some minor structural differences, so that one 

 or more subspecies or varieties may have to be recognized when the 

 material is more closely studied. 



Camponotinae. 



77. Prenolepis imparis Say. 



California: Piedmont, Alameda County and Berkeley (J. C. Brad- 

 ley); Point Loma, near San Diego (P. Leonard); Palo Alto and San 

 Jose (H. Heath); Santa Inez Mts. near Santa Barbara, Pasadena, 

 San Diego, Claremont, San Gabriel Mts. and Yosemite Village 

 (Wheeler). 



Nevada: Ormsby County (C. F. Baker). 



Oregon: Ashland (W. Taverner). 



Arizona: Grand Canyon, .3670 ft. (Wheeler); Ramsay Canyon, 

 Huachuca Mts. (W. M. Mann). 



Colorado: Cheyenne Mt. near Colorado Springs (Wheeler). 



