Stigmatomma pallipes

Stigmatomma pallipes, or vampire ant, is a species of ant in the subfamily Amblyoponinae. It is one of three species of Stigmatomma native to North America. They can be hard to find due to their habitat and small colony size.

Description
A reddish-brown ant, generally 4.5-6 mm.

Habitat
Individuals are typically found in wooded areas, in damp soil and leaf litter. Nests are usually found in soil under rocks, rotting logs, or at the base of trees. Colonies are small, typically consisting of anywhere between two and sixty individuals, although the latter is uncommon.

Range
The vampire ant is found across most southern and eastern states, west to California and north to Quebec and Ontario.