Temporal range: Barremian–Recent
Embolemidae is a small family of around 64 species and 3 genera distributed around the world. They are small solitary parasitoid wasps, and are parasites on planthopper nymphs of the families Achilidae and Cixiidae.
Females are wingless while males have wings, and in temperate regions emerge later than the females, which overwinter as adults. The wingless females have been recorded from the nests of ants and small mammal burrows, or under stones in pastures and grasslands and they appear to act as ant mimics. A Palearctic species, Embolemus ruddii, has been found in association with the ant species Formica fusca and Lasius flavus, while in Japan, Embolemus walkeri was taken in a nest of another ant, from the genus Myrmica. A Nearctic species, Embolemus confusus, has been reared from nymphs of a planthopper in the family Achilidae, where the host fed on fungi beneath the bark of rotting logs. The wasp larva lives in a bulging sac attached to the host nymph between the second and third segments.