Formica subnitens

This species nests in thatched mounds, occasionally under stones or logs, usually with some surrounding thatch. They are occasionally found in earthen domes (Cole 1954, Mackay and Mackay 2002)

Identification
The middle and hind tibiae of this species have erect hairs in two rows (usually fewer than ten hairs in both rows combined), but do not have erect hairs scattered over the remainder of the surface. The erect hairs extend over nearly the entire length of the tibia. The gaster has few erect hairs on the first tergum (fewer than 10, excluding those along posterior edge of tergum). This latter characteristic separates it from the closely related Formica ravida which has more than 10 hairs on the same surface. The clypeus, cheeks and malar area are often shiny. (Mackay and Mackay 2002)

Distribution
Western North America.

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

Habitat
In New Mexico (Mackay and Mackay 2002) - Grasslands to pinyon cedar forests, willows, and cedars.

Biology
Nevada, Wheeler and Wheeler (1986) - This species seems to make little use of thatch. The mounds were usually of soil and detritus. F. subnitens is widely scattered in the northern half of the state; 4,600-10,500 ft. We have 9 records from 9 localities, 2 of which were in the Cool Desert and 2 in the Coniferous Forest Biome. Three nests were described: (1) a dome 48 cm in diameter composed of soil and gravel with only a little plant debris; (2) under many stones; (3) messy pile of thatch 28 by 53 cm piled against a stone.

Nest site selected in open areas devoid of cover. Nest begun under stone or by excavation in the soil. Little or no use made of thatching. The finished nest without any superstructure or with a thin disc of thatching spread around the opening (Creighton, 1940).

Nomenclature

 *  subnitens. Formica rufa subsp. subnitens Creighton, 1940a: 10, fig. 1 (w.) U.S.A. Miller, 1957: 255 (q.m.). Subspecies of integroides: Creighton, 1950a: 490. Raised to species: Cole, 1955b: 50; Miller, 1957: 253; Mackay, Lowrie, et al. 1988: 111 (in key).

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.
 * Downing H., and J. Clark. 2018. Ant biodiversity in the Northern Black Hills, South Dakota (Hymenoptera, Formicidae). Journal of the Kansas Entomological Society 91(2): 119-132.
 * Knowlton G. F. 1970. Ants of Curlew Valley. Proceedings of the Utah Academy of Sciences, Arts and Letters 47(1): 208-212.
 * Mackay W. P., and E. E. Mackay. 2002. The ants of New Mexico (Hymenoptera: Formicidae). Lewiston, New York: Edwin Mellen Press, 400 pp.
 * 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.
 * Trager J. Distributions of Nearctic Formica rufa group species. Personal communication 05 February 2014.
 * Wheeler G. C., and J. Wheeler. 1986. The ants of Nevada. Los Angeles: Natural History Museum of Los Angeles County, vii + 138 pp.
 * Wheeler, G.C. and J. Wheeler. 1988. A checklist of the ants of Wyoming. Insecta Mundi 2(3&4):230-239