Psiloglossa simplicipes Rohwer, 1909:357, 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 ♀ (U.S. National Museum, Washington). - 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 richardsi Bohart, in Krombein et al., 1979); Carpenter & Kimsey, 2009Carpenter, J.M. & L.S. Kimsey 2009. The genus Euparagia Cresson (Hymenoptera: Vespidae; Euparagiinae). American Museum Novitates 3643:1-11.:8 ( listed as synonym of Euparagia richardsi Bohart, in Krombein et al., 1979).
Euparagia richardsi Bohart, in Krombein et al., 1979:1470 Replacement name for Psiloglossa simplicipes Rohwer, 1909 by Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1470. - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution); Carpenter & Kimsey, 2009Carpenter, J.M. & L.S. Kimsey 2009. The genus Euparagia Cresson (Hymenoptera: Vespidae; Euparagiinae). American Museum Novitates 3643:1-11. (distribution).