Tetraschininae is a subfamily of the chalcid wasp family Eulophidae. Galls were collected and a previously undescribed species of chalcid wasp emerged. Preservation is a problem for fairyflies (and other small chalcid wasps). Ormyrus is a genus of chalcid wasps in the family Ormyridae. Meruacesa is a genus of chalcid wasps from the family Eulophidae. Fairyflies exhibit considerable variation in their wing shapes in comparison to other chalcid wasps. Ablerus is a genus of chalcid wasps belonging to the family Aphelinidae. Brasema is a genus of chalcid wasps from the family Eupelmidae. Aphytis mytilaspidis is a species of chalcid wasp in the Aphelinidae family. It belongs to the family of fairyflies Mymaridae of the chalcid wasp superfamily Chalcidoidea. Copidosoma is a genus of chalcid wasps, which are parasitoids of Lepidoptera. Cryptastichus sabo is a species of Afrotropical chalcid wasp from the family Eulophidae. Bardylis is a small genus of chalcid wasps belonging to the family Aphelinidae. The Mymaridae are the most primitive members of the chalcid wasp superfamily (Chalcidoidea). In contrast, the antennae of other chalcid wasps are separated only by one diameter.