Plesiomasaris maculiceps Cameron, 1904:267, ♂.Mexico; Bohart, 1938Bohart, R.M. 1938. A synopsis of the genus Euparagia (Hymenoptera, Vespidae, Euparagiinae). The Pan-Pacific Entomologist 14:136-139.:138, Type ♂ (British Museum); 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). - Meade-Waldo & Morley, 1914Meade-Waldo, G. & C. Morley 1914. Notes and synonymy of Hymenoptera in the collection of the British Museum. The Annals and Magazine of Natural History ser. 8: v. 14:402-410. (distribution). - As Euparagia maculiceps: - Bohart, 1938Bohart, R.M. 1938. A synopsis of the genus Euparagia (Hymenoptera, Vespidae, Euparagiinae). The Pan-Pacific Entomologist 14:136-139. (distribution); Bohart, 1948Bohart, R.M. 1948. The genus Euparagia in North America (Hymenoptera, Vespidae, Euparagiinae). The Pan-Pacific Entomologist 24:149-154. (distribution); 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, 1938Bohart, R.M. 1938. A synopsis of the genus Euparagia (Hymenoptera, Vespidae, Euparagiinae). The Pan-Pacific Entomologist 14:136-139.:138, Type ♂ (British Museum); Bohart, 1965Bohart, R.M. 1965. Synonymy of North American Odynerini described by Peter Cameron. The Pan-Pacific Entomologist 41 (2):107-113.:112, Holotype ♂ (BMNH); 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). Synonymized with Plesiomasaris maculiceps Cameron, 1904 by Meade-Waldo & Morley, 1914Meade-Waldo, G. & C. Morley 1914. Notes and synonymy of Hymenoptera in the collection of the British Museum. The Annals and Magazine of Natural History ser. 8: v. 14:402-410.:404. - Bohart, 1938Bohart, R.M. 1938. A synopsis of the genus Euparagia (Hymenoptera, Vespidae, Euparagiinae). The Pan-Pacific Entomologist 14:136-139.:137 ( listed as synonym of Euparagia maculiceps (Cameron, 1904)); Bohart, 1948Bohart, R.M. 1948. The genus Euparagia in North America (Hymenoptera, Vespidae, Euparagiinae). The Pan-Pacific Entomologist 24:149-154.:154 ( listed as synonym of Euparagia maculiceps (Cameron, 1904)); Bohart, 1965Bohart, R.M. 1965. Synonymy of North American Odynerini described by Peter Cameron. The Pan-Pacific Entomologist 41 (2):107-113.:112 ( listed as synonym of Euparagia maculiceps (Cameron, 1904)); 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, 1948Bohart, R.M. 1948. The genus Euparagia in North America (Hymenoptera, Vespidae, Euparagiinae). The Pan-Pacific Entomologist 24:149-154.:154 ( listed as synonym of Euparagia maculiceps (Cameron, 1904)); 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)).