Tetraschininae is a subfamily of the chalcid wasp family Eulophidae. Galls were collected and a previously undescribed species of chalcid wasp emerged. 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. Cryptastichus sabo is a species of Afrotropical chalcid wasp from the family Eulophidae. The Mymaridae are the most primitive members of the chalcid wasp superfamily (Chalcidoidea). The chalcid wasp "Torymus nitens" is an example of a parasitoid in oak marble galls. Ixodiphagus hookeri, the tick wasp, is a chalcid wasp which lays its eggs into ticks. The chalcid wasp, "Tetrastichus pompilicola" has been reared from larvae of "A. nigerrimus" in Newfoundland.