WHEELER: ANTS OF THE GENUS FORMICA. 417 
Head, thorax, and antennae red; petiole and gaster black, the former 
often with a reddish tinge. Mandibular teeth black. Lower pleurae 
and in many specimens also the vertex of the head, infuscated. Legs 
red; coxae, femora, and tibiae more or less infuscated, except at the 
articulations. 
Femate. Length 7.5-8 mm. 
Head small, narrower than the thorax; antennal scapes extending 
nearly + their length beyond the posterior corners of the head. Re- 
sembling the worker in pilosity, sculpture, and coloration, except in 
the following characters: — The hairs are of a yellowish cast, and on 
the gaster are pointed and of the same thickness as on the head and 
thorax, although they are long and in certain lights conspicuous, 
especially towards the tip of the body. Pleurae clouded with fuscous; 
posterior portion of head, posterior edge of pronotum, and anterome- 
dian and two parapsidal blotches on the mesonotum, fuscous. 
Metanotum and scutellum, except its anterior border, black. Petiole 
varying from dark red to blackish, of the same shape as in the worker, 
except that in profile its superior border is much sharper in some 
specimens. Wings whitish hyaline, with pale brown veins and stigma. 
TYPE LocALity.— Colorado: Canyon City (P. J. Schmitt). 
Colorado: Breckenridge, West Cliff (P. J. Schmitt); Colorado 
Springs, Salida, Boulder, Wild Horse (Wheeler); South Boulder 
Canyon (T. D. A. Cockerell); Troublesome (S. A. Rohwer). 
New Mexico: Glorieta, Old Pecos Pueblo (T. D. A. Cockerell). 
South Dakota: Medicine Root, Pine Ridge Ind. Reserv. (Thompson). 
Harding County (S. S. Visher). 
Montana: Helena (W. M. Mann). 
Alberta: Medicine Hat (J. C. Bradley). 
The worker of this species differs from sanguinea and resembles 
F. pergandei in the structure of the thorax. The head, especially of 
large workers, is more like that of small sanguinea workers and broader 
than in pergandet. From this latter species and from all the subspecies 
of sanguinea, except, perhaps, obtusopilosa, munda differs in the pecu- 
liar thick, blunt hairs, especially on the gaster. The female is readily 
distinguished from the female sanguinea by the smaller head and longer 
antennal scapes. Some years ago Professor Emery informed me (in 
litterts) that the specimens which I later described as F. munda were 
identical with the ones he regarded in his “ Beitrage”’ as representing 
a variety of pergandei from Colorado. I infer therefore that F. munda 
cannot be a synonym of his F. sanguinea obtusopilosa, as one might 
be led to believe from a study of his brief description of that subspecies. 
F. munda lives in grassy places, especially in irrigated plains and 
