The area that is limited distally by the posterior margin of the prementum and laterally by the median margins of the cardines and the stipites.
written by: Popovici, O. A., I. Mikó, K. Seltmann, and A. R. Deans. 2012. The maxillo-labial complex in Sparasion (Platygastroidea: Platygastridae). Journal of Hymenoptera Research in prep.