10 The Asiloidea comprise a very large superfamily insects in the order Diptera, the true flies.

In Therevidae, Apsilocephalidae, and Scenopinidae, the males are usually holoptic (eyes meet at top of head).

[2] Known larvae of this superfamily have posterior spiracles arising dorsally from the penultimate abdominal segment, making this feature a synapomorphy.

[1][3] Another feature possessed by most asiloids (except Bombyliidae and Hilarimorphidae) is the larval cranium being modified into a hinged metacephalic rod.

[4] The ancestral lifestyle for asiloid larvae is believed to be parasitoidism, with this being replaced by predation in all families except Bombyliidae.