Pseudagenia relativa Cameron, 1891:170, ♂. ♂, Mexico, Teapa in Tabasco (leg. H.H. Smith); Wahis, 1995Wahis, R. 1995. Nouvelles mentions de Pompilides du Nicaragua (Hymenoptera: Pompilidae). Revista Nicaraguense de Entomologia 33:1-6.:5, Holotype ♂, examined (NMHLondon, n° 19.461). - Cameron, 1888-1900Cameron, P. 1888-1900. Biologia Centrali-Americana - Insecta. Hymenoptera. (Fossores) Vol. II. R. H. Porter and Dulau & Co., London. 413pp, 14 pl.:170 (listed); 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). - As Ageniella relativa: - Wahis, 1995Wahis, R. 1995. Nouvelles mentions de Pompilides du Nicaragua (Hymenoptera: Pompilidae). Revista Nicaraguense de Entomologia 33:1-6.:5 (comb. nov.). - As Auplopus relativus: - Dreisbach, 1963Dreisbach, R.R. 1963. New species of spider wasp, genus Auplopus from the Americas South of the United States (Hymenoptera: Psammocharidae). Proceedings of the United States National Museum 114:137-211. (distribution), 150 (key male). - As Psammochares relativus: - Banks, 1917Banks, N. 1917. New fossorial Hymenoptera. Bull. Mus. Comp. Zool. 61:97-116.:108 (listed).