Formica accreta

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Formica accreta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Formicini
Genus: Formica
Species: F. accreta
Binomial name
Formica accreta
Francoeur, 1973

Formica accreta casent0005358 profile 1.jpg

Formica accreta casent0005358 dorsal 1.jpg

Specimen labels

At a Glance • Polygynous  



This is a black species with the metasternal process poorly developed. The gena is without coarse punctures, although poorly defined, elongate punctures are located just anterior to the eyes. The scapes are usually longer than the head length. The anterior border of the clypeus is angulate, the eyes are large (maximum diameter 0.43 - 0.54 mm). The ventral surface of the head, posterior border, dorsum of the mesosoma and dorsum of the petiole are without erect hairs. The first gastral tergite has only 3 or 4 short (> 0.1 mm), blunt hairs. The dorsal surfaces of the head and mesosoma are weakly shining. (Mackay and Mackay 2002)

Keys including this Species


Western Canada south to California, east to Montana, south to New Mexico.

Distribution based on Regional Taxon Lists

Nearctic Region: Canada (type locality), United States.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb


This species is a host for the ant Polyergus mexicanus (a slave maker).



The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • accreta. Formica accreta Francoeur, 1973: 182, figs. 308-323 (w.q.m.) CANADA. Junior synonym of fusca: Wheeler, G.C. & Wheeler, J. 1986g: 16. Revived from synonymy: Bolton, 1995b: 190.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.


Francoeur 1973. Figures 308-323.


  • Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp. (page 190, Revived from synonymy; revived status)
  • Francoeur, A. 1973. Révision taxonomique des espèces néarctiques du groupe fusca, genre Formica (Formicidae, Hymenoptera). Mém. Soc. Entomol. Qué. 3: 1-316 (page 182, figs. 308-323 worker, queen, male described)
  • Higgins, R. J. and B. S. Lindgren. 2015. Seral changes in ant (Hymenoptera: Formicidae) assemblages in the sub-boreal forests of British Columbia. Insect Conservation and Diversity. 8:337-347. doi:10.1111/icad.12112
  • Mackay, W. P. and E. Mackay. 2002. The ants of New Mexico (Hymenoptera: Formicidae). Edwin Mellen Press, Lewiston, NY.
  • Wheeler, G. C.; Wheeler, J. 1986g. The ants of Nevada. Los Angeles: Natural History Museum of Los Angeles County, vii + 138 pp. (page 16, Junior synonym of fusca)