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.

Nest site selected in areas of moderate to heavy cover or in open areas devoid of cover. Nest begun in or under a log or stump, or under stone or by excavation in the soil. Little or no to extensive use made of thatching. The finished nest considerably influenced by the size of the object in which it was started, ranging from without any superstructure or with a thin disc of thatching spread around the opening to a dome shaped nest (Creighton, 1940)

This ant is thought to be a host for the guest or xenobiont but this needs confirmation.

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.

References based on Global Ant Biodiversity Informatics

 * Allred D. M. 1982. Ants of Utah. The Great Basin Naturalist 42: 415-511.
 * Allred, D.M. 1982. The ants of Utah. Great Basin Naturalist 42:415-511.
 * Bestelmeyer B. T., and J. A. Wiens. 2001. Local and regional-scale responses of ant diversity to a semiarid biome transition. Ecography 24: 381-392.
 * Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology https://doi.org/10.1002/ecy.2944
 * Johnson, R.A. and P.S. Ward. 2002. Biogeography and endemism of ants (Hymenoptera: Formicidae) in Baja California, Mexico: a first overview. Journal of Biogeography 29:10091026/
 * Longino, J.T. 2010. Personal Communication. Longino Collection Database
 * Mallis A. 1941. A list of the ants of California with notes on their habits and distribution. Bulletin of the Southern California Academy of Sciences 40: 61-100.
 * Miller C. D. F. 1957. Taxonomic status of Formica subnitens Creighton and F. integroides Emery, with a description of the sexuals of F. subnitens (Hymenoptera: Formicidae). Insectes Soc. 4: 253-257.
 * MontBlanc E. M., J. C. Chambers, and P. F. Brussard. 2007. Variation in ant populations with elevation, tree cover, and fire in a Pinyon-Juniper-dominated watershed. Western North American Naturalist 67(4): 469491.
 * Rees D. M., and A. W. Grundmann. 1940. A preliminary list of the ants of Utah. Bulletin of the University of Utah, 31(5): 1-12.
 * Vásquez-Bolaños M. 2011. Lista de especies de hormigas (Hymenoptera: Formicidae) para México. Dugesiana 18: 95-133
 * Wheeler G. C., and J. Wheeler. 1986. The ants of Nevada. Los Angeles: Natural History Museum of Los Angeles County, vii + 138 pp.
 * Wheeler W. M. 1913. A revision of the ants of the genus Formica (Linné) Mayr. Bulletin of the Museum of Comparative Zoology 53: 379-565.
 * Wheeler W. M. 1917. The mountain ants of western North America. Proceedings of the American Academy of Arts and Sciences 52: 457-569.
 * Wheeler, G.C. and J. Wheeler. 1978. Mountain ants of Nevada. Great Basin Naturalist 35(4):379-396
 * Wheeler, G.C. and J. Wheeler. 1988. A checklist of the ants of Montana. Psyche 95:101-114