WHEELER, NORTH AMERICAN ANTS 329 



scapes and thorax, with the exception of the epinotum. Pubescence very short 

 and dilute, but visible on the head, thorax and gaster. 



Black; mandibles, antennal funiculi, tarsi and articulations of the legs 

 brown ; wings colored like those of the female. 



The types of this species, which is very constant and easily recognized 

 by its deep black color, smooth surface and peculiar pilosity, came from 

 California. I have examined specimens from the following localities : 



California : Yosemite, Sierra Nevada, Sierra Valley, San Jacinto Mts., 

 6000 ft. (F. Grinnel, Jr.) ; Baldy Peak, San Gabriel Mts. (Brewster, 

 Joos and Crawford) ; Blue Lake, Humboldt County; Felton, Santa Cruz 

 Mts.; Alta Peak (9500-11,000 ft.), Giant Forest to Marble Fork, Sissons 

 (J. C. Bradley) ; McCloud and Castle Crag (A. Fenyes). 



Washington: Seattle (T. Kincaid) ; Union City (J. C. Bradley). 



Oregon: Corvallis (Amer. Mus. Nat. Hist). 



Montana: Weeksville (S. Henshaw). 



Idaho: Moscow Mt. (W. M. Mann), Lewiston and Moscow (J. M. 

 Aldrich). 



Colorado : Ute Pass and Cheyenne Canyon (Wheeler) ; South Boulder 

 Canyon and Sugar Loaf (T. D. A. Cockerell). 



Utah: Beaver Canyon (C. Schaeffer). 



New Mexico: Santa Fe (on Populus), Pecos and Glorieta (T. D. A. 

 Cockerell). 



Arizona: (A. P. Morse). 



Mexico: Gulf of California (A. Agassiz). 



As shown by this list of localities, C. Icevigatus is a moun.tain ant 

 peculiar to the high ranges of the western states. It extends into 

 Mexico and also for a short distance into British America (Vancouver 

 Island, according to Lord). I believe that it will rarely be found below 

 an altitude of 6000 ft. I have seen it only at elevations of 7000-8000 ft. 

 in the mountains of Colorado. It forms large colonies which nest in dry 

 stumps or logs after the manner of C. herculeanus and its various sub- 

 species and varieties. In behavior it closely resembles the south European 

 C. vagus. 



Emery mentions three female specimens from Descanso, Calif., which 

 seemed to represent a form allied to but distinct from Icevigatus. These 

 resembled the females of the herculeanus group, but had 6-toothed 

 mandibles and an indistinctly carinate clypeus. The whole head was 

 opaque, densely punctate, with scattered piligerous, shallow foveolse, and 

 the sides of the head bore short, stiff bristles. The tibijfi had short, 

 oblique hairs; the color was like that of the C. ligniperda female. I 

 have not been able to find any specimens answering to this description 

 among my material. 



