Promesonotal suture distinct. Petiole large with paired dorsal projections, usually spines. Head, trunk and petiole always boldly striate, parts of gaster nearly as strongly striate as trunk in most species. Generally nesting in soil. Winged reproductive females are not known.
Males are yellowish-brown to reddish brown and winged.
Diacamma is distributed in the Indo-Australian region, and includes around 10 described species. Current species-level taxonomy of the genus is considered unsound. Editor of the descriptions Original text by Masao Kubota. English translation by Kazuo Ogata, edited by Robert W. Taylor.