Allegheny Mound Ant

Family Name

Formica Exsectoides



Crawling – Biting


Workers of this species measure about 0.375 inch in length.


Red head and thorax with black abdomen.


The name of this ant derives from the way it constructs mounds, which usually measure up to three feet in diameter. The large mounds have resulted in occasional “fire ant scares” in northern U.S. states, although the Allegheny mound ant cannot sting. The ants feed on insects and the sweet honeydew produced by aphids and similar insects.


Allegheny mound ants are typically seen in yards located next to fields or wooded areas.

Tips for Control

Allegheny mound ants do not invade houses, but their large mounds can make lawns unattractive. Typically, individual mounds will require direct treatment with an appropriately labelled pest control product.