Mutilla fugax Smith, 1879:220 - As Ephuta fugax: - Mickel, 1952Mickel, C.E. 1952. The Mutillidae (Wasps) of British Guiana. Zoologica (New York) 37 (3):105-150. (distribution), 112 (comb. nov.); Rasmussen & Asenjo, 2009Rasmussen, C. & A. Asenjo 2009. A checklist to the wasps of Peru (Hymenoptera, Aculeata). ZooKeys 15:1-78. (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).
Mutilla morada Cresson, 1902:63 Synonymized with Ephuta fugax (Smith, 1879) by Mickel, 1952Mickel, C.E. 1952. The Mutillidae (Wasps) of British Guiana. Zoologica (New York) 37 (3):105-150.:112. - 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.:209 ( listed as synonym of Ephuta fugax (Smith, 1879)).