Agenia ruficeps Smith, 1864:265, ♀. ♀, Ega (Brazil) (National Collection), Lectotype ♀, examined (NHMLondon, n° 19.426), designated by Wahis, 1995Wahis, R. 1995. Nouvelles mentions de Pompilides du Nicaragua (Hymenoptera: Pompilidae). Revista Nicaraguense de Entomologia 33:1-6.:5, Lectotype ♀, examined (NMHLondon, n° 19.426), designated by Wahis, 1995Wahis, R. 1995. Nouvelles mentions de Pompilides du Nicaragua (Hymenoptera: Pompilidae). Revista Nicaraguense de Entomologia 33:1-6.:5, Paralectotype ♀, examined (OUM), designated by Wahis, 1995Wahis, R. 1995. Nouvelles mentions de Pompilides du Nicaragua (Hymenoptera: Pompilidae). Revista Nicaraguense de Entomologia 33:1-6.:5; Waichert et al., 2018Waichert, C., W.D. Colombo, C.D. von Dohlen & J.P. Pitts 2018. Taxonomic contributions to Ageniella Banks, 1912 (Hymenoptera: Pompilidae) from Brazil. Zootaxa 4403 (1):133-153.:142, Holotype ♀, examined (BMNH). Synonymized with Ageniella sanguinolenta (Smith, 1864) by Waichert et al., 2018Waichert, C., W.D. Colombo, C.D. von Dohlen & J.P. Pitts 2018. Taxonomic contributions to Ageniella Banks, 1912 (Hymenoptera: Pompilidae) from Brazil. Zootaxa 4403 (1):133-153.:142. - As Ageniella ruficeps: - Wahis, 1995Wahis, R. 1995. Nouvelles mentions de Pompilides du Nicaragua (Hymenoptera: Pompilidae). Revista Nicaraguense de Entomologia 33:1-6.:5 (comb. nov.); Santos et al., 2015Santos, E.F. dos, Y.C Grandinete & F.B. Noll 2015. Additions to the checklist of Scoliidae, Sphecidae, Pompilidae and Vespidae of Peru, with notes on the endemic status of some species (Hymenoptera, Aculeata). ZooKeys 519:33-48. (distribution). - As Pseudagenia ruficeps: - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution), 208 (listed).
Agenia sanguinolenta Smith, 1864:264, ♀. ♀, Villa Nova (River Amazon) (National Collection); Wahis, 1995Wahis, R. 1995. Nouvelles mentions de Pompilides du Nicaragua (Hymenoptera: Pompilidae). Revista Nicaraguense de Entomologia 33:1-6.:5, Holotype ♀, examined (NMHLondon, n° 19.438); Waichert et al., 2018Waichert, C., W.D. Colombo, C.D. von Dohlen & J.P. Pitts 2018. Taxonomic contributions to Ageniella Banks, 1912 (Hymenoptera: Pompilidae) from Brazil. Zootaxa 4403 (1):133-153.:142, Holotype ♀, examined (BMNH). - As Ageniella sanguinolenta: - Wahis, 1995Wahis, R. 1995. Nouvelles mentions de Pompilides du Nicaragua (Hymenoptera: Pompilidae). Revista Nicaraguense de Entomologia 33:1-6.:5 (comb. nov.); Waichert et al., 2014Waichert, C., Rodriguez, J. & J.P. Pitts 2014. New additions to the Honduran fauna of spider wasps (Hymenoptera: Pompilidae) with the description of two species. Zootaxa 3873 (5):590-600. (distribution); Castro-Huertas et al., 2014Castro-Huertas, V., J.P. Pitts, J. Rodriguez, C. Waichert & F. Fernández 2014. New records of spider wasps (Hymenoptera, Pompilidae) from Colombia. ZooKeys 443:35-44. (distribution); Fernández et al., 2017Fernández, F., V. Castro, J. Rodríguez, C. Waichert & J.P. Pitts 2017. Avispas cazadoras de arañas de Colombia (Hymenoptera: Pompilidae). Proceditor Ltda., Bogotá, D. C., Colombia. (distribution); Waichert et al., 2018Waichert, C., W.D. Colombo, C.D. von Dohlen & J.P. Pitts 2018. Taxonomic contributions to Ageniella Banks, 1912 (Hymenoptera: Pompilidae) from Brazil. Zootaxa 4403 (1):133-153. (distribution); Fernández et al., 2022Fernández, F., J. Rodriguez, C. Waichert, B. Decker & J. Pitts 2022. Twenty two years later: An updated checklist of Neotropical spider wasps (Hymenoptera: Pompilidae). Zootaxa 5116 (4):451-503. (distribution); Kurczewski et al., 2024Kurczewski, F.E., R.C. West & C. Waichert 2024. New host records for Nearctic and Neotropical spider wasps (Hymenoptera: Pompilidae). Insecta Mundi 1034:1-32. (distribution, hosts [Trechaleidae]). - As Pseudagenia sanguinolenta: - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749.:208 (listed).
Ageniella alternata Banks, 1946:424, ♀. Type ♀, Blairmont, British Guiana, October (M. C. Z., no. 26755, leg. F. X. Williams); Waichert et al., 2018Waichert, C., W.D. Colombo, C.D. von Dohlen & J.P. Pitts 2018. Taxonomic contributions to Ageniella Banks, 1912 (Hymenoptera: Pompilidae) from Brazil. Zootaxa 4403 (1):133-153.:142, Holotype ♀, examined (MCZ, 26755). Synonymized with Ageniella sanguinolenta (Smith, 1864) by Waichert et al., 2018Waichert, C., W.D. Colombo, C.D. von Dohlen & J.P. Pitts 2018. Taxonomic contributions to Ageniella Banks, 1912 (Hymenoptera: Pompilidae) from Brazil. Zootaxa 4403 (1):133-153.:142. - Banks, 1946Banks, N. 1946. Studies of South American Psammocharidae. Part 1. Bulletin of the Museum of Comparative Zoology at Harvard College 96:311-525.:423 (key female).