Mutilla læta Smith, 1855:57 - 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), 47 ( listed as synonym of Mutilla hilaris Gerstäcker, 1874).
Mutilla hilaris Gerstäcker, 1874:57, ♀.Nov. Granada, Bogotà (Mus. Berol.). Replacement name for Mutilla laeta Smith, 1855 by Gerstäcker, 1874Gerstäcker, A. 1874. Mutillarum Americae meridionalis indigenarum synopsis systematica et synonymica. Archiv für Naturgeschichte 40 (1):41-77.:57 (Der Smith'sche Name kann dieser Art nich verbleiben, weil er von demselben Autor einige Seiten vorher (p. 46, No. 225) schon einer Brasilianischen beigelegt worden ist). - 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), 300 (incertae sedis).