See text Oligositini Ashmead, 1904 Poropoeini Girault, 1912 Trichogrammatoidae Foerster, 1856 The Trichogrammatidae are a family of small endoparasitoid wasps in the superfamily Chalcidoidea that include some of the smallest of all insects, with most species having adults less than 1 mm in length, with species of Megaphragma having an adult body length less than 300 μm.

Their fore wings are typically somewhat stubby and paddle-shaped, with a long fringe of hinged setae around the outer margin to increase the surface area during the downstroke.

[3][4] The neurons develop during pupation with functional nuclei and manufacture enough proteins to last through the short lifespans of the adults.

Before emerging as an adult, the nuclei are destroyed, allowing the wasp to conserve space by making the neurons smaller.

[4] Trichogrammatids parasitize the eggs of many different orders of insects, notably the Lepidoptera, Coleoptera, Hemiptera, Hymenoptera and Diptera.