Scelionidae

The hymenopteran family Scelionidae is a very large cosmopolitan group (over 3000 described species in some 176 genera) of exclusively parasitoid wasps, mostly small (0.5–10 mm), often black, often highly sculptured, with (typically) elbowed antennae that have a 9- or 10-segmented flagellum. It was once considered to be a subfamily of the Platygastridae, but has been revived in the most recent classification of Platygastroidea.^[1]

Scelionidae
Telenomus sp.
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Suborder:	Apocrita
Infraorder:	Proctotrupomorpha
Superfamily:	Platygastroidea
Family:	Scelionidae Haliday, 1839
Subfamilies
Scelioninae Teleasinae Telenominae

They are generally idiobionts, attacking the eggs of various insects, such as butterflies (e.g., the hackberry emperor),^[2] and spiders. Many scelionids are important in biological control. Several genera are wingless, and a few attack aquatic insect eggs underwater.