Formica integroides

Nests in open woods. Extensive use of thatch, often in the shape of a dome.

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

Biology
Nevada, Wheeler and Wheeler (1986) - All our 6 records are from the Sierra, i.e., near Lake Tahoe. They represent 4 localities in the Coniferous Forest Biome. Nests were in decaying stumps covered, or surrounded by, thatch. All colonies were populous, active, and aggressive; the bite was annoying.

Nomenclature

 *  integroides. Formica truncicola subsp. integroides Wheeler, W.M. 1913f: 438 (w.q.) U.S.A. [First available use of Formica rufa subsp. obscuriventris var. integroides Emery, 1893i: 649; unavailable name.] Subspecies of rufa: Creighton, 1940a: 3. Raised to species and senior synonym of subcaviceps: Creighton, 1950a: 489. Senior synonym of subfasciata: Brown, 1965d: 185.
 * subcaviceps. Formica rufa subsp. subcaviceps Creighton, 1940a: 1, fig. 1 (w.m.) U.S.A. [First available use of Formica truncicola subsp. integra var. subcaviceps Wheeler, W.M. 1917a: 540; unavailable name.] Junior synonym of integroides: Creighton, 1950a: 489.
 * subfasciata. Formica rufa subsp. subfasciata Creighton, 1940a: 1, fig. 1 (w.) U.S.A. [First available use of Formica truncicola subsp. integroides var. subfasciata Wheeler, W.M. 1917a: 539; unavailable name.] Subspecies of integroides: Creighton, 1950a: 490. Junior synonym of integroides: Brown, 1965d: 185.