They are distinguished from most other Pompilidae by their petiolate abdominal structure and typical absence of a transverse carina on the first segment of the gaster.

These traits are, however, shared with Melanagenia of the tribe Pepsini, which is separated by the lack of malar space, deep lateral sulcus of the pronotum, and wing venation.

[3] The most common of these nesting strategies is building mud nests, which are frequently communal in contrast to most other spider wasp groups.

[4] As typical of the rest of the family, the Ageniellini provision their nests with a single spider and then lay an egg on it.

[1] Most of the species remove the legs of their spider prey before bringing it to the nest.