Tiphia obscura Fabricius, 1804:233, sex not indicated.Carolina (Mus. Dom. Bose); Kimsey, 2009Kimsey, L.S. 2009. Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae). Zootaxa 2224:30-50.:47, Holotype ♀ (Copenhagen). - As Myzinum obscurum: - Krombein, 1963Krombein, K.V. 1963. Natural history of Plummers Island, Maryland. XVII. Annotated list of the wasps (Hymenoptera: Bethyloidea, Scolioidea, Vespoidea, Pompiloidea, Sphecoidea). Proceedings of the Biological Society of Washington 76:255-280. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution); Kimsey, 2009Kimsey, L.S. 2009. Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae). Zootaxa 2224:30-50. (distribution).
Plesia nigripes Guérin, 1838:57, Kimsey, 2009Kimsey, L.S. 2009. Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae). Zootaxa 2224:30-50.:47, Holotype ♂ (Paris). - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1267 ( listed as synonym of Myzinum obscurum (Fabricius, 1804)); Kimsey, 2009Kimsey, L.S. 2009. Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae). Zootaxa 2224:30-50.:47 ( listed as synonym of Myzinum obscurum (Fabricius, 1804)).
Plesia fuliginosa Lepeletier, 1845:581, ♂. ♂, Pensylvanie (Musée de M. Serville); Kimsey, 2009Kimsey, L.S. 2009. Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae). Zootaxa 2224:30-50.:47, Holotype ♂ (Paris, lost?). - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1267 ( listed as synonym of Myzinum obscurum (Fabricius, 1804)); Kimsey, 2009Kimsey, L.S. 2009. Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae). Zootaxa 2224:30-50.:47 ( listed as synonym of Myzinum obscurum (Fabricius, 1804)).
Elis berlyi Brimley, 1927:238, ♀. Holotype ♀, Charleston, South Carolina, July 23, 1926 (Professor Franklin Sherman, leg. A. Berly); Kimsey, 2009Kimsey, L.S. 2009. Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae). Zootaxa 2224:30-50.:47, Holotype ♀ (Washington). Synonymized with Myzinum obscurum (Fabricius, 1804) by Kimsey, 2009Kimsey, L.S. 2009. Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae). Zootaxa 2224:30-50.:47. - As Myzinum berlyi berlyi: - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution).