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parasitoid

Many insects place their egg in or on the egg or larva of their prey; the larva that emerges slowly devours the host larva. To call this behaviour parasitic is not justified, because real parasites, like fleas or lice, need to keep their host alive, rather than to kill it. Therefore this type of insects is called parasitoids. For plant parasites most parasitoids belong to the order Hymenoptera.