Mutilla crux Smith, 1855:56, Cambra et al., 2017Cambra, R.A., D. Quintero & G. Pagliano 2017. Three new species of Ephutini (Hymenoptera: Mutillidae) from Venezuela and Ecuador, including taxonomic changes for seven Neotropical species of Ephuta. IL Natural. Valtellinese - Atti Museo civ. Storia naturale Morbegno 28:47-64.:55, Type (Hope Ent. Collection, Oxford). - Smith, 1855Smith, F. 1855. Catalogue of Hymenopterous Insects in the collection of the British Museum. Part III, Mutillidae and Pompilidae. :203 pp, 5 pl. (distribution); Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution); Pagliano et al., 2020Pagliano G., D.J. Brothers, R. Cambra, A.S. Lelej, P. Lo Cascio, M.M. Palmerini, P.L. Scaramozzino, K.A. Williams & M. Romano 2020. Checklist of names in Mutillidae (Hymenoptera), with illustrations of selected species. Bolletino del Museo Regionale di Scienze naturali Torino 36 (1-2):5-425. (distribution), 299 (incertae sedis). - As Ephuta crux: - Cambra et al., 2017Cambra, R.A., D. Quintero & G. Pagliano 2017. Three new species of Ephutini (Hymenoptera: Mutillidae) from Venezuela and Ecuador, including taxonomic changes for seven Neotropical species of Ephuta. IL Natural. Valtellinese - Atti Museo civ. Storia naturale Morbegno 28:47-64. (distribution), 55 (comb. nov.).