Comprised of a single family, and a single genus.
Family Megalyridae
References
Froggatt, W. W. 1906. Notes on the hymenopterous genus Megalyra Westwood, with descriptions of new species. Proceedings of the Linnean Society of New South Wales 31: 399-407.
Shaw, S. R. 1990. A taxonomic revision of the long-tailed wasps of the genus Megalyra Westwood (Hymenoptera: Megalyridae). Invertebrate Taxonomy 3: 1005-1052.