alternative definition added almost 15 years ago by Andy Deans
shallow, arched depression on upper margin of clypeus, usually rudimentary; in frontal view.
Reference: Masner, L., and J. L. García. 2002. The genera of Diapriinae (Hymenoptera: Diapriidae) in the new world. Bulletin of the American Museum of Natural History 268:107-138.
Cross reference:
None provided.