Mutilla Gila Blake, 1871:250, ♂. ♂, Texas (leg. Belfrage). - Cresson, 1872Cresson, E.T. 1872. Hymenoptera Texana. Transactions of the American Entomological Society 4:153-292. (distribution); Blake, 1879Blake, C.A. 1879. Catalogue of the Mutillidae of North America, with descriptions of new species. Transactions of the American Entomological Society 7:243-254. (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); Fox, 1899Fox, W.J. 1899. The North American Mutillidae. Transactions of the American Entomological Society 25:219-300. (distribution). - As Pseudomethoca gila: - Mickel, 1935Mickel, C.E. 1935. Descriptions and records of Nearctic mutillid wasps of the genera Myrmilloides and Pseudomethoca. Transactions of the American Entomological Society 61:383-398. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (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 Sphaerophthalma gila: - Blake, 1886Blake, C. 1886. Monograph of the Mutillidae of North America. Transactions of the American Entomological Society 13:179-286. (distribution).
Mutilla ilione Fox, 1899:268, ♀. 2 ♀♀, Texas: Fedor, Lee County (leg. Birkman). - 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.:109 ( listed as synonym of Pseudomethoca gila (Blake, 1871)). - As Pseudomethoca ilione: - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution).
Mutilla aprica Melander, 1903:322, ♀. 3 ♀♀, Fedor, Lee Co., Texas, May and October, 1899 (leg. Birkman). - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1302 ( listed as synonym of Pseudomethoca ilione (Fox, 1899)); 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.:109 ( listed as synonym of Pseudomethoca gila (Blake, 1871)). - As Pseudomethoca aprica: - Mickel, 1925Mickel, C.E. 1925. A revision of the mutillid wasps of the genera Myrmilloides and Pseudomethoca occuring in America North of Mexico. Proceedings of the United States National Museum 64 (15):1-52. (distribution); Mickel, 1935Mickel, C.E. 1935. Descriptions and records of Nearctic mutillid wasps of the genera Myrmilloides and Pseudomethoca. Transactions of the American Entomological Society 61:383-398. (distribution).