Formica

Formica is a genus of ants of the family Formicidae, commonly known as wood ants, mound ants, or field ants. Formica is the type genus of the Formicidae, and of the subfamily Formicinae. In turn Formica's own type species is the European red wood ant Formica rufa.

Read more about Formica:  Habitat, Nests, "Slave-making" Behavior, Species