Formica opaciventris

This species lives in soil mounds or mounds with some thatching.

Identification
Workers can be recognized as the posterior border is concave as seen in full-face view, and the propodeum is somewhat angulate as seen in profile. The pronotum has several spatulate hairs and the mesonotum has a few short, bristly hairs. The dorsum of the gaster has many scattered, short, bristly hairs and has sparse, silver, appressed pubescence. This species would be considered a member of the microgyna group if the posterior border was not concave. (Mackay and Mackay 2002)

Distribution
Canada, Alberta. United Statea: Montana, North Dakota and south to New Mexico.

Distribution based on Regional Taxon Lists
Nearctic Region: Alberta, Canada, Canada, United States.

Habitat
In New Mexico (Mackay and Mackay 2002) - Sagebrush scrub, meadows up to the edge of forests.

Nomenclature

 *  opaciventris. Formica exsectoides var. opaciventris Emery, 1893i: 653 (w.m.) U.S.A. Gregg, 1952b: 14 (q.). Subspecies of exsectoides: Wheeler, W.M. 1913f: 484. Raised to species: Creighton, 1950a: 514.