Timulla adrastis Mickel, 1938:631, ♂. Holotype ♂, Mexico: Tuxpan, 28.xi.1921 (U.S. National Museum, no. 52146, leg. A.W. Morrill); Cambra & Quintero, 1993Cambra, R.A. & Quintero, D. 1993. Studies on Timulla Ashmead (Hymenoptera: Mutillidae): New distribution records and synonymies, and descriptions of previously unknown Allotypes. The Pan-Pacific Entomologist 69 (4):299-313.:309, Holotype ♂, examined (NMNH, No. 52146). - Mickel, 1938Mickel, C.E. 1938. The Neotropical mutilid wasps of the genus Timulla Ashmead (Hymenoptera:Mutillidae). Transactions of the Royal Entomological Society of London 87 (22):529-680. (distribution); Cambra & Quintero, 1993Cambra, R.A. & Quintero, D. 1993. Studies on Timulla Ashmead (Hymenoptera: Mutillidae): New distribution records and synonymies, and descriptions of previously unknown Allotypes. The Pan-Pacific Entomologist 69 (4):299-313. (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). - As Timulla adastris: - Maes, 1999 1999. Catalogo de los insectos y artropodos terrestres de Nicaragua. Volumen III. León, Nicaragua. 1170-1898. (distribution).
Timulla pilatrix Mickel, 1938:651, ♀. Holotype ♀, Mexico (U.S. National Museum, no. 52151); Cambra & Quintero, 1993Cambra, R.A. & Quintero, D. 1993. Studies on Timulla Ashmead (Hymenoptera: Mutillidae): New distribution records and synonymies, and descriptions of previously unknown Allotypes. The Pan-Pacific Entomologist 69 (4):299-313.:309, Holotype ♀, examined (NMNH, No. 52151). Synonymized with Timulla adrastis Mickel, 1938 by Cambra & Quintero, 1993Cambra, R.A. & Quintero, D. 1993. Studies on Timulla Ashmead (Hymenoptera: Mutillidae): New distribution records and synonymies, and descriptions of previously unknown Allotypes. The Pan-Pacific Entomologist 69 (4):299-313.:309. - Mickel, 1938Mickel, C.E. 1938. The Neotropical mutilid wasps of the genus Timulla Ashmead (Hymenoptera:Mutillidae). Transactions of the Royal Entomological Society of London 87 (22):529-680. (distribution); Maes, 1999 1999. Catalogo de los insectos y artropodos terrestres de Nicaragua. Volumen III. León, Nicaragua. 1170-1898.:1721 ( listed as synonym of Timulla adastris Mickel, 1938); 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.:262 ( listed as synonym of Timulla adrastis Mickel, 1938).