BioStor
 | Natural history of Plummers Island, Maryland XVII. Annotated list of the wasps (Hymenoptera: Bethyloidea, Scolioidea, Vespoidea, Pompiloidea, Sphecoidea) K V Krombein (1963) Proceedings of The Biological Society of Washington 76: 255-280 |
 | Primary insect types in the Illinois Natural History Survey collection, exclusive of the Collembola and Thysanoptera Donald W Webb (1980) Bulletin Illinois Natural History Survey 32(2): 55-189 |