"Parasitic wasps" refers to a specific type of wasp that lays their eggs inside other insects. These eggs then hatch and the newborn wasps feed off the host insect, eventually killing it. Full definition
Normally, when members of two related species of parasitic wasps in the genus Nasonia, N. giraulti and N. longicornis, mate with their more distant relative N. vitripennis, the hybrid offspring die. (quantamagazine.org)
Tiny parasitic wasps of the tongue - twisting genus Glyptapanteles practice mind control on their hosts. (adn.com)
They say that genes from wasps have been transferred to several butterfly species, including the monarch, by symbiotic viruses used as biological weapons by parasitic wasps. (newscientist.com)