Pompilus modestus Smith, 1864 - Banks, 1946Banks, N. 1946. Studies of South American Psammocharidae. Part 1. Bulletin of the Museum of Comparative Zoology at Harvard College 96:311-525.:499 (listed). - As Caliadurgus modestus: - Fernández et al., 2017Fernández, F., V. Castro, J. Rodríguez, C. Waichert & J.P. Pitts 2017. Avispas cazadoras de arañas de Colombia (Hymenoptera: Pompilidae). Proceditor Ltda., Bogotá, D. C., Colombia. (distribution); 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). - As Calicurgus modestus: - Banks, 1946Banks, N. 1946. Studies of South American Psammocharidae. Part 1. Bulletin of the Museum of Comparative Zoology at Harvard College 96:311-525.:499 (listed); Junco y Reyes, 1951Junco y Reyes, J.J. 1951. Himenópteros de Espana. Fam. Psammocharidae (Olim. Pompilidae). II. Claveliinae, Calicurgini. EOS Revista Española de Entomologia 27 (2):143-233. (distribution); Dreisbach, 1961Dreisbach, R.R. 1961. Eighteen new species in the genus Calicurgus Lepeletier (Hymenoptera:Psammocharidae) from Mexico, Central and South America with a key to all the speciesand photomicrographs of the male genitalia and subgenital plates. The American Midland Naturalist 65 (2):360-380. (distribution). - As Pseudagenia modesta: - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution), 206 (listed); Banks, 1944Banks, N. 1944. The Psammocharidae (Hymenoptera) taken at Kartabo and other localities in British Guiana. Zoologica 29:97-112. (distribution), 109 (listed).