Tachytes concinnus Smith, 1856:304, ♂. ♂, Brazil (Santarem) (B.M.); Bohart, 1979Bohart, R.M. 1979. Tachytes of South America (Hymenoptera, Sphecidae, Larrinae). Transactions of the American Entomological Society 104:435-505.:458, Holotpye ♂ (British Museum, Natural History, London). - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution); Bohart, 1979Bohart, R.M. 1979. Tachytes of South America (Hymenoptera, Sphecidae, Larrinae). Transactions of the American Entomological Society 104:435-505. (distribution); 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); Rasmussen & Asenjo, 2009Rasmussen, C. & A. Asenjo 2009. A checklist to the wasps of Peru (Hymenoptera, Aculeata). ZooKeys 15:1-78. (distribution).
Tachytes argyrofacies Strand, 1910:166, Bohart, 1979Bohart, R.M. 1979. Tachytes of South America (Hymenoptera, Sphecidae, Larrinae). Transactions of the American Entomological Society 104:435-505.:458, Holotpye ♀ (Humboldt Universität Zoologische Museum, E. Berlin, Germany). - Bohart, 1979Bohart, R.M. 1979. Tachytes of South America (Hymenoptera, Sphecidae, Larrinae). Transactions of the American Entomological Society 104:435-505.:458 ( listed as synonym of Tachytes concinnus Smith, 1856); 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.:37 ( listed as synonym of Tachytes concinnus Smith, 1856).