Black Giant Ichneumon Wasp

Megarhyssa atrata

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image of Black Giant Ichneumon Wasp on tree trunk
The black giant ichneumon wasp, Megarhyssa atrata, belongs to a genus called the giant ichneumons. The female’s body can be 1½ inches long, and her ovipositor 5 inches long.
Donna Brunet
Family

Ichneumonidae (ichneumon wasps) in the order Hymenoptera (ants, bees, wasps)

Description

The black giant ichneumon wasp, Megarhyssa atrata, belongs to a genus of ichneumons called the giant ichneumons. The female’s body can be 1½ inches long, and her ovipositor 5 inches long. The larvae parasitize the larvae of wood-boring insects. Look for this species in deciduous forests.

Learn more about the black giant ichneumon wasp and other ichneumons in their group page.