BioStor
 | Nearctic wasps of the subfamilies Pepsinae and Ceropalinae H Townes (1957) Bulletin of the United States National Museum 209: 1-286 |
 | 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 |