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Cornfield Ant

This ant gets its common name from its close association with the corn root aphid.

  • Common Name: Cornfield or moisture ant
  • Scentific Name: Lasius alienus (Foerster)
  • Class/Order/Family: Insecta/Hymenoptera/Formicidea
  • Metamorphosis: Complete
  • Size


    Workers monomorphic, about 1/16-1/8" long; queens about 1/4" long.

  • Color


    Brown to very dark reddish brown, approaching black.

  • Biology


    Mature colonies are moderate to large, composed of up to several thousand workers but only one queen.

  • Habit


    Inside, they nest in areas of moist, rotting wood including behind bathroom tub wall tiles or in the bath trap, and damp crawl spaces.

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