An endoparasitoid is a parasite that lives inside another animal and ultimately kills it. Endoparasitoids, such as some solitary wasps, are commonly used as biological control agents.

A photograph of a parasitic wasp, _Peristenus digoneutis_, preparing to lay an egg in a tarnished plant bug nymph.

A parasitic wasp, Peristenus digoneutis, laying an egg in a plant bug nymph.
Scott Bauer, USDA

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