556 WHEELER. 



posterior § of the first gastric and the whole of the succeeding seg- 

 ments except the anal region, fuscous. 



Described from a single worker taken by Prof. T. D. A. Cockerell 

 at the Half Way House on Pike's Peak, Colo. Several workers taken 

 by Dr. C. G. Hewitt at Treesbank, in Southern Manitoba, though 

 slightly larger, also belong to this variety, which is clearly transitional 

 to the subsp. bicolor Wasm. The slaves accompanying these speci- 

 mens belong to the typical Formica fusca. 



181. Polyergus rufescens subsp. mexicanus Forel. 



This form, described from Mexico, without precise locality, is 

 hardly distinct from the subsp. breviceps, to judge from a couple of 

 cotypes received from Prof. Forel. 



182. Polyergus rufescens subsp. bicolor Wasmann. 

 Wisconsin: Prairie du Chien, type locality (H. Muckermann). 

 Illinois: Rockford (Wheeler). 



Montana: Yellow Bay, Flathead Lake (C. C. Adams). 



183. Polyergus rufescens subsp. laeviceps Wheeler. 

 California: Mt. Tamalpais, 1000ft. (Wheeler); Laws (A. Wetmore). 



184. Camponotus laevigatus F. Smith. 



California: Yosemite Village, 4000 ft. and Tallac, Lake Tahoe 

 (Wheeler). 



Washington: Seattle (Wheeler). 



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



Colorado: Meeker (W. W. Robbins). 



Previously recorded from numerous localities in California, Oregon, 

 Washington, Idaho, Montana, Colorado, Utah, New Mexico, Arizona 

 and Northern Mexico. At Seattle I found its large colonies in huge 

 pine stumps less than 100 feet above sea-level. Further south it is 

 distinctly boreal, rarely, if ever, descending below 4000-5000 ft. 

 and occurring as high as 11,000 ft. on Alta Peak, Cala. 



185. Camponotus herculeanus L. var. whymperi Forel. 

 Alaska: Seward (F. H. Whitney). 



British Columbia: Emerald Lake and Glacier (Wheeler); Arrow- 

 head (C. G. Hewitt). 



Alberta: Laggan, Lake Louise and Moraine Lake (Wheeler). 



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



Colorado: Bullion Peak, Park Co. 12,000 ft.; Chimney Gulch, 



