538 bulletin: museum of comparative zoology. 



Utah: (Amer. Mus. Nat. Hist. Coll.). 



Colorado: Colorado Springs, Colorado City, Manitou, Florissant, 

 Wild Horse, Buena Vista (Wheeler); Boulder (T. D. A. Cockerell). 



New Mexico: Las Vegas (E. Tuttle, K. Tipton); Glorieta, Pecos 

 (T. D. A. Cockerell); Albuquerque (Wheeler); Las Valles (Miss 

 Mary Cooper); Alamogordo (G. v. Krockow). 



Arizona: Ash Fork, Coconino Forest at the Grand Canyon, Wil- 

 liams (Wheeler); Flagstaff (F. E. Pratt). 



Wyoming: Carbon County (Amer. Mus. Nat. Hist. Coll.). 



Washington: Almota (A. L. Melander); Pullman (R. W, Doane, 

 W. M. Mann); Wawawai (W. M. Mann). 



Ontario: Guelph (Wheeler). 



Quebec: Kingsmere (Wheeler). 



Nova Scotia: Digby (J. Russell). 



British Columbia: Vermillion Pass, 5,000-6,500 ft. (E. Whymper). 



Alberta : (E . Whymper) . 



Emery regarded this ant as a variety of F. subpoKta but it is cer- 

 tainly quite distinct, though its worker resembles the small workers 

 of the latter species. F. ncoga gates, however, differs in its more 

 abundant, more delicate and paler pilosity and in the proportions of 

 the basal funicular joints of the worker. The male differs greatly 

 from the male subpoUta in color and in the structure of the genitalia. 

 I had referred the species to Proformica before I noticed that Emery 

 regarded his F. lasioidcs, which is merely a subspecies of neogaqutes, as 

 belonging to this subgenus. In certain respects it is a connecting link 

 between Proformica and the subgenus Formica, the frontal carinae not 

 being abbreviated as in the Old World species of the former group. 



F. neogagates is a very timid ant which nests in small colonies 

 under stones in open, often very dry and stony country. In the 

 Rocky Mts. its colonies are abundant at altitudes between 6,000 and 

 8,000 ft., in the Eastern States it is much rarer and more sporadic 

 and, though preferring the hills of the Appalachian system, may de- 

 scend almost to sea level. It is, however, properly a subboreal 

 species and even in the latitude of New York is rarely found at low 

 elevations. Like the forms of F. fusca it is readily enslaved in all 

 parts of its range by the various subspecies of F. sanguinca. 



118. F. (P.) NEOGAGATES NEOGAGATES var. MORBIDA, var. nOV. 



W^ORKER. Length 3-4 mm. 



Differing from the typical neogagates in the smaller average size and 

 in color. The body is reddish or brownish yellow, the legs and an- 



