A Review of the Genera of Oligositini (Hymenoptera: Trichogrammatidae) with a preliminary hypothesis of phylogenetic relationships.

The twelve genera of the tribe Oligositini (Trichogrammatidae: Oligositinae) are reviewed. The genus Brachistagrapha De Santis is removed from the tribe and synonymized with Chaetogramma Doutt, a member of the Trichogrammatini (new synonymy). Phylogenetic analysis supports the recognition of two subtribes, the Oligositina and Eteroligositina. The large cosmopolitan genus Oligosita Walker is found to be polyphyletic and its current species are assignable to both subtribes. Those transferred to the Eteroligositina are now placed in the resurrected genus Pseudoligosita Girault, long considered a synonym of Oligosita. However, the removal of these species does not render Oligosita monophyletic. Remaining problems in the classification of the Oligositini are discussed. Included are a brief synopsis of each genus and a key to genera.