Pepsis Caridei Brèthes, 1908:240, ♂. ♂, Rep. Argentina?, Lectotype ♂, examined, designated by Vardy, 2000Vardy, C.R. 2000. The New World tarantula-hawk wasp genus Pepsis Fabricius (Hymenoptera: Pompilidae). Part 1. Introduction and the P. rubra species-group. Zool. Verh. Leiden 332:1-86.:63. - Brèthes, 1914Brèthes, J. 1914. Contribution â l'étude des Pepsis. Museo nacional de historia natural de Buenos Aires 26:235-360. (distribution); Lucas, 1919Lucas, R. 1919. Pompiliden-Studien. I. Arch. Naturgesch., A. 83 (5):1-180+3 pls. (distribution); Hurd, 1952Hurd, P.D. Jr. 1952. Revision of the Nearctic species of the pompilid genus Pepsis (Hymenoptera, Pompilidae). The American Museum of Natural History, Bulletin 98 (article 4):261-334. (distribution); Vardy, 2000Vardy, C.R. 2000. The New World tarantula-hawk wasp genus Pepsis Fabricius (Hymenoptera: Pompilidae). Part 1. Introduction and the P. rubra species-group. Zool. Verh. Leiden 332:1-86. (distribution), 34 (key male), 57 (key female), 58 (key female), 63 (description female, description male, distribution, listed); Wahis & Rojas, 2003Wahis, R. & F. Rojas 2003. Los Pompilidos de Chile (Hymenoptera: Pompilidae). Rev. Chilena Ent. 29:89-103. (distribution), 90 (distribution, listed, taxonomy); Kurczewski et al., 2020Kurczewski, F.E., R.C. West, C. Waichert, K.C. Kissane, D. Ubick & J.P. Pitts 2020. New and unusual host records for North American and South American spider wasps (Hymenoptera: Pompilidae). Zootaxa 4891 (1):1-112. (distribution), 8 (prey); Fernández et al., 2022Fernández, F., J. Rodriguez, C. Waichert, B. Decker & J. Pitts 2022. Twenty two years later: An updated checklist of Neotropical spider wasps (Hymenoptera: Pompilidae). Zootaxa 5116 (4):451-503. (distribution).
Pepsis pampeana Brèthes, 1908:240, ♂♀. ♂♀, Rep. Argentina, Lectotype ♂, examined (Museo Argentino de Ciencias Naturales, Buenos Aires), designated by Vardy, 2000Vardy, C.R. 2000. The New World tarantula-hawk wasp genus Pepsis Fabricius (Hymenoptera: Pompilidae). Part 1. Introduction and the P. rubra species-group. Zool. Verh. Leiden 332:1-86.:63. Synonymized with Pepsis caridei Brèthes, 1908 by Vardy, 2000Vardy, C.R. 2000. The New World tarantula-hawk wasp genus Pepsis Fabricius (Hymenoptera: Pompilidae). Part 1. Introduction and the P. rubra species-group. Zool. Verh. Leiden 332:1-86.:63. - Brèthes, 1914Brèthes, J. 1914. Contribution â l'étude des Pepsis. Museo nacional de historia natural de Buenos Aires 26:235-360. (distribution); Lucas, 1919Lucas, R. 1919. Pompiliden-Studien. I. Arch. Naturgesch., A. 83 (5):1-180+3 pls. (distribution); Banks, 1946Banks, N. 1946. Studies of South American Psammocharidae. Part 1. Bulletin of the Museum of Comparative Zoology at Harvard College 96:311-525. (distribution), 351 (key), 352 (listed); Hurd, 1952Hurd, P.D. Jr. 1952. Revision of the Nearctic species of the pompilid genus Pepsis (Hymenoptera, Pompilidae). The American Museum of Natural History, Bulletin 98 (article 4):261-334. (distribution); Wahis & Rojas, 2003Wahis, R. & F. Rojas 2003. Los Pompilidos de Chile (Hymenoptera: Pompilidae). Rev. Chilena Ent. 29:89-103.:90 ( listed as synonym of Pepsis caridei Brèthes, 1908).