Plesiomasaris maculiceps Cameron, 1904:267, ♂.Mexico; Bohart, 1989Bohart, R.M. 1989. A review of the genus Euparagia (Hymenoptera, Masaridae). Journal of the Kansas Entomological Society 62 (4):462-467.:465, Lectotype ♂ (British Museum, Natural History, London); Carpenter & Kimsey, 2009Carpenter, J.M. & L.S. Kimsey 2009. The genus Euparagia Cresson (Hymenoptera: Vespidae; Euparagiinae). American Museum Novitates 3643:1-11.:7, Lectotpye ♂ (London). - As Euparagia maculiceps: - Carpenter & Kimsey, 2009Carpenter, J.M. & L.S. Kimsey 2009. The genus Euparagia Cresson (Hymenoptera: Vespidae; Euparagiinae). American Museum Novitates 3643:1-11. (distribution).
Odynerus simplicipes Cameron, 1905:380, ♂. ♂, Mexico; Bohart, 1989Bohart, R.M. 1989. A review of the genus Euparagia (Hymenoptera, Masaridae). Journal of the Kansas Entomological Society 62 (4):462-467.:465, Holotype ♂ (British Museum, Natural History, London). - Bohart, 1989Bohart, R.M. 1989. A review of the genus Euparagia (Hymenoptera, Masaridae). Journal of the Kansas Entomological Society 62 (4):462-467.:465 ( listed as synonym of Euparagia maculiceps (Cameron, 1904)); Carpenter & Kimsey, 2009Carpenter, J.M. & L.S. Kimsey 2009. The genus Euparagia Cresson (Hymenoptera: Vespidae; Euparagiinae). American Museum Novitates 3643:1-11.:7 ( listed as synonym of Euparagia maculiceps (Cameron, 1904)).
Odynerus vicarius Schulz, 1906:219 - Bohart, 1989Bohart, R.M. 1989. A review of the genus Euparagia (Hymenoptera, Masaridae). Journal of the Kansas Entomological Society 62 (4):462-467.:465 ( listed as synonym of Euparagia maculiceps (Cameron, 1904)); Carpenter & Kimsey, 2009Carpenter, J.M. & L.S. Kimsey 2009. The genus Euparagia Cresson (Hymenoptera: Vespidae; Euparagiinae). American Museum Novitates 3643:1-11.:7 ( listed as synonym of Euparagia maculiceps (Cameron, 1904)).