Psen modesta Rohwer, 1916:244, ♂. 2 ♂♂, Mayaguez, Porto Rico; Type ♂, Mayaguez, Porto Rico (U.S.N.M., No. 15081); Malloch, 1933Malloch, J.R. 1933. Review of the wasps of the subfamily Pseninae of North America (Hymenoptera: Aculeata). Proceedings of the United States National Museum 82:1-60.:26, Type, Mayaguez, Puerto Rico (U.S.N.M., No. 15081). - Wolcott, 1948Wolcott, G.N. 1948. The insects of Puerto Rico. The Journal of Agriculture of the University of Puerto Rico 32 (4):749-975. (distribution). - As Mimesa modesta: - Alayo, 1973Alayo, P.D. 1973. Catálogo de los Himenopteros de Cuba. Instituto Cubano del libro, La Habana. 1-218. (distribution). - As Mimumesa modesta: - Starr & Hook, 2003Starr, C.K. & Hook, A.W. 2003. The aculeate Hymenoptera of Trinidad, West Indies. Occasional Papers o the Department of Life Sciences, University of the West Indies 12:1-31. (distribution); Medina, 2016Medina Rosa, J.R. 2016. Avispas de Puerto Rico - Hymenoptera: Symphyta, Apocrita (Aculeata). Ediciones Digitales, 1-23. (distribution). - As Mimumesa modesta modesta: - Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139. (distribution).