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Definition of Ichneumon fly
1. Noun. Hymenopterous insect that resembles a wasp and whose larvae are parasitic on caterpillars and other insect larvae.
Generic synonyms: Hymenopter, Hymenopteran, Hymenopteron, Hymenopterous Insect
Group relationships: Family Ichneumonidae, Ichneumonidae
Group relationships: Family Ichneumonidae, Ichneumonidae