Formica indianensis

Identification
The scape and tibiae of this species are almost without erect hairs, except for a few scattered bristles on the flexor surface of the tibiae. Erect hairs are sparse, but include a few scattered hairs on the clypeus, up to six erect hairs on the dorsum of the head, up three erect hairs on the ventral surface of the head, erect hairs scattered on the dorsum of the mesosoma, on the petiole, and on all surfaces of the gaster. Many of the hairs areunt tipped, especially those on the pronotum. The head, mesosoma, petiole, and appendages are reddish-brown with infuscation on the upper surfaces, the gaster is dark brown. All surfaces are dull and punctate. This species could be confused with Formica postoculata, Formica difficilis and Formica querquetulana, but can be separated by the few hairs on the dorsum of the head.

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

Biology
This species is likely to be a temporary parasite of another species of Formica, but its host is.

Nomenclature

 *  indianensis. Formica indianensis Cole, 1940: 224 (w.m.) U.S.A.

Taxonomic Notes
It is possible that it will be shown to be a synonym of Formica postoculata when more material of both species becomes available. Both F. postoculata and F. indianensis may be synonyms of F. difficilis.

References based on Global Ant Biodiversity Informatics

 * Carroll T. M. 2011. The ants of Indiana (Hymenoptera: Formicidae). Master's Thesis Purdue university, 385 pages.
 * Cole A. C., Jr. 1940. A new ant from Indiana. American Midland Naturalist 23: 224-226.