Definition of Trichogrammatidae

The family Trichogrammatidae are tiny wasps in the Chalcidoidea that include some of the smallest of all insects, with most species having adults less than 1 mm in length. There are over 840 species in ca. 80 genera worldwide. Trichogrammatids parasitize the eggs of many different orders of insects. As such, they are among the more important biological control agents known, attacking many pest insects (esp. Lepidopterans).