A cladistic analysis of 12 new Aleiodes Wesmael species in the Tetrasphaeropyx Ashmead lineage, and the type species of Tetrasphaeropyx, T. pilosus Cresson, is provided, based on 52 morphological characters. A synapomorphy that defines the Tetrasphaeropyx lineage is the carapace-like 4th metasomal tergite covering all tergites apicad of it. The strict consensus tree of 3 equally parsimonious trees suggests an early bifurcation in the evolution of the Tetrasphaeropyx group between what now appear to be northerly and southerly lineages. Most southerly lineage species have a deeper carapace with a better-defined flange than any northern lineage species.