pupivora

from The Century Dictionary.

• noun A division of Hymenoptera characterized by the petiolate or stalked abdomen, the female armed with an extensile ovipositor, the larvæ footless, and having the habit of ovipositing in the larvæ or pupæ of other insects (often however in plants, as in the gall-insects), upon which the young feed when they hatch, whence the name; the pupivorous, entomophagous, or spiculiferous hymenopterous insects.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A group of parasitic Hymenoptera, including the ichneumon flies, which destroy the larvæ and pupæ of insects.