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Allegheny Mound Ant

Found from Nova Scotia south to Georgia and westward to Wisconsin and Iowa, discovery of this ant’s mounds often leads to fire ant scares.

  • Common Name: Allegheny Mound Ant
  • Scentific Name: Formica exsectoides Forel
  • Class/Order/Family: Insecta/Hymenoptera/Formicidea
  • Metamorphosis: Complete
  • Size


    3.2 to 6.3 mm

  • Color


    reddish head and thorax, abdomen and legs are dark brown to black

  • Biology


    The life cycle from egg to adult ranges from 2 to 3-1/3 months, depending primarily on temperature. Eggs are present during the spring and early summer and the white legless larvae are cared for by workers in galleries in the soil.

  • Habit


    The workers make galleries and tunnels in the ground. The tunnels extend as deep as almost 1 m (~3 ft) into the soil. As they dig, the workers pile the excavated soil up to make the mound. The mounds can reach records of about 5 m (~16ft) in diameter, especially with older nests found in fields and wooded areas.

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