Back to Ants

Allegheny Mound Ant


The Allegheny Mound Ant (Formica exsectoides) is a type of ant native to the Atlantic area of North America. Often very striking in appearance, these ants have a red-orange head and thorax with black-brown gasters. They have 1 node. Mound ants are generally between 1/8” – 1/4” long.

The ant’s colonies are complex. Several different mounds may be interconnected. The tunnels may extend 3 feet (0.91 m) into the ground and 4 feet (1.2 m) upwards in the mound. The mound serves as a solar incubator for the eggs and larvae. Unlike most other ants, Allegheny Mound ants have multiple queens. The ants have a lifespan of 2.5-3 months. They feed on dead insects and aphid honeydew.

Ants hibernate in the tunnelways of a mound below the soil surface. Foraging for food begins when the colony becomes active in the spring. This is usually in late March or early April. Workers attack and dismember beetles, sowbugs, spiders, small caterpillar larvae, and many other arthropods that the ants can overcome. The other type of food they seek is honeydew produced by sap-sucking insects like aphids, scales, and treehoppers.

To control the Allegheny Mound ant, you need to treat the ant hill.

  1. Use a rake to disrupt the hill.
  2. Sprinkle a properly labeled insect dust on the entire ant hill.
  3. Lightly water the dust so it stays in place.
  4. After 7 days, repeat if necessary.
Allegheny Mound Ant Information Download View
Crawling Insects - Preventative Set Up Preparation Sheet Download View
Crawling Insects - Insecticide Treatment Preparation Sheet Download View