Abstract. The eggs and first‐instar planidial larvae of Stilbula montana, Kapala sp., Pseudometagea schwarzii, Orasema sp. (Eucharitidae), Perilampus chrysopae, Perilampus fulvicornis, Perilampus hyalinus (Perilampidae), and Chrysolampus thenae (Pteromalidae: Chrysolampinae) are described. The morphological data are coordinated with the information available in the literature to develop general descriptions for the planidial larvae of Perilampus and the Eucharitidae. Character states were polarized with reference to a ground plan chalcidoid larva and relationships were determined cladistically. Nine synapomorphies are suggested for the planidial larvae of Perilampidae and Eucharitidae, indicating a possible sister group relationship. A re‐examination of the larvae of Chrysolampus thenae indicates that the Chrysolampinae could be the sister group of Perilampidae + Eucharitidae.