WHEELER: ANTS OF THE GENUS FORMICA. 507 
Michigan: Porcupine Mountains, Isle Royale (O. McCreary). 
New Hampshire: Mt. Washington, 3,840 ft. (W. Reiff); Lafayette, 
4,000 ft., Sphagnum bog (J. H. Emerton). 
Alaska: Kassiloff Lake, Kenai Peninsula (Berlin Mus.); Sitka, 
Metlakaktla, Kadiak (Th. Pergande); Homer (A. Mehner). 
British Columbia: Vancouver (A. L. Melander); Lake Louise, 
Hecto, Prairie Hills, Selkirk Mountains, above timberline, Fielde, 
Roger’s Pass (J. C. Bradley). 
Alberta: Laggan, Banff (J. C. Bradley); Emerald Summit Lake, 
Vermillion Pass, Vermillion Valley, 6,100 ft., Yoho Valley 4,600 ft., 
Ice River Valley 5,000 ft. (E. Whymper). 
Saskatchewan: Methy Lake (R. Kennicott). 
Ontario: Rat Portage (J. C. Bradley). 
Quebec: Saguenay River (Geo. Engelhardt); Anticosti Island 
(S. Henshaw); East Maine River (A. Skinner); Mingan Island, 
Niapisca Island (S. Henshaw). 
Labrador: Square Island (A. S. Packard); St. Lewis Inlet. 
Newfoundland: Bay of Islands (L. P. Gratacap); Spruce Brook, 
Port Saunders, Port au Croix (Amer. Mus. Nat. Hist. Coll.). 
Nova Scotia: Digby (J. Russell). 
This variety has been confounded by Forel, Pergande, and myself, 
and possibly also by Emery, with the true neorufibarbis described 
below. It is, however, a perfectly distinct form, which, notwith- 
standing its wide distribution as shown by the preceding list of locali- 
ties, is the most stenothermal and alpine of all our American forms of 
fusca. It is closely related to subaenescens in sculpture and pubes- 
cence but is characterized by the deep red color of the thorax and the 
constant infuscation of the pro- and mesonotum even in large speci- 
mens. I have found it nesting in rather small colonies under stones 
or in logs in woods or shady canyons at high altitudes, just below 
timberline. 
89. F. FUSCA FUSCA var. NEORUFIBARBIS Emery. 
F. fusca var. neorufibarbis Emery, Zool. jahrb. Syst., 1894, 7, p. 660, 8 . 
Worker. Length 3-6 mm. 
Like the variety gelida in sculpture. Frontal area shining. Head 
and thorax subopaque, gaster shining, transversely shagreened. 
Hairs yellow, very short and sparse, absent on the thorax. Pubes- 
cence finer and a little denser on the gaster than in neorufibarbis but 
not concealing the shining surface. Head black, cheeks, front, cly- 
