Members of the genus Asaphes are hyperparasitic on aphidiid wasps in aphids. Hosts for the single Nearctic species of Bairamlia are unknown. There are 6 world species in 1 genus. This subfamily is essentially Neotropical with 1 species in Australia and 1 species extending into California and Arizona from Mexico. These are extremely unusual chalcidoids and could easily be mistaken for ichneumonids or braconids.
All species are elongate and thin.
In all species the head has well-developed ridges and crests in the area between the eye and antennal basin. World numbers are unknown. These are relatively unlikely to be collected except possibly for Hemadas nubilipennis , a phytophagous, gall-forming species on blueberries in eastern North America. It may be recognized by a darkened spot on the fore-wing and the scutellum that projects over the propodeum and obscures it in dorsal view. A few other subfamilies are known, each of which contain a few genera or less with one species each.