BioStor
 | Descriptions of Mexican Ichneumonidae E T Cresson (1874) Proceedings of the Academy of Natural Sciences of Philadelphia 1873: 374-413 |
 | A review of the ichneumonid subfamily Tryphoninae G C Davis (1897) Transactions of the American Entomological Society 24: 193-348 |
 | Classification of the Ichneumon flies, or the superfamily Ichneumonoidea Willam H Ashmead (1900) Proceedings of the U.S. National Museum 23(1206): 1-220 |
 | Type species of the genera of ichneumon flies H L Viereck (1914) Bulletin of the United States National Museum 83: 1-186 |
 | The Cresson types of Hymenoptera Ezra Townsend Cresson (1916) Memoirs of the American Entomological Society 1: 1-141 |
 | A catalogue and reclassification of the Nearctic Ichneumonidae (Hymenoptera). Part II. The subfamilies Mesoleiinae, Plect-iscinae, Orthocentrinae, Diplazoninae, Metopiinae, Ophioninae, Mesochorinae Henry K Townes (1945) Memoirs of The American Entomological Society 11(2): 479-925 |
 | Ichneumon-Flies of America North of Mexico: 1. Subfamily Metopiinae Henry Townes and Marjorie Townes (1959) Bulletin United States National Museum 216(1): 1-316 |