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Compendium Spot ID Tutorials Labs Glossary NC Pests

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Module 6

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Module 10

Spot ID Characters for the Family

Ichneumonidae

Ichneumon Wasps


Key Characters:

  • Forewings lack a costal cell
  • 16 or more segments in the antennae
  • Two-segmented trochanters
  • Females with a long, slender ovipositor
  • Horsehead cell visible in front wing

Picture Gallery

One of the most abundant families in the order Hymenoptera, these wasps possesses many unique characteristics that allow them to stand out.  Each forewing lacks a costal cell, but has a horsehead cell towards the middle of the wing.  The antenna is unusually long with 16 or more segments.  Commonly recognized as slender wasps, the females have a long ovipositor that is often longer than the body.  In addition to these traits, the ichneumon wasps also have two-segmented trochanters that allow for an easy identification.  Many species of this family are internal parasitoids of the immature stages of the host, where they may complete their development.