BioStor
 | Catalogue of Hymenoptera in the collection of the Entomological Society of Philadelphia, from Colorado Territory E T Cresson (1865) Proceedings of the Entomological Society of Philadelphia 4: 242-313 |
 | Hymenoptera Texana E T Cresson (1872) Transactions of the American Entomological Society 4: 153-292 |
 | Neue Ichneumoniden der Schweiz S Brauns (1888) Mitteilungen der Schweizerischen Entomologischen Gesellschaft 8: 1-9 |
 | Revision of the North American species of Ichneumon-flies of the genus Exetastes Gravenhorst R A Cushman (1937) Proceedings of the United States National Museum 84: 243-312 |
 | A catalogue and reclassification of the Nearctic Ichneumonidae (Hymenoptera). Part I Henry K Townes (1944) Memoirs of The American Entomological Society 11(1): 1-477 |