Encyrtus Vectius Walker, 1847:21 - Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, V. Chalcididae et Proctotrupidae. Sumptibus Guilelmi Engelmann, VII + 598. (distribution); Burks, 1975Burks, B.D. 1975. The species of Chalcidoidea described from North America north of Mexico by Francis Walker (Hymenoptera). Bulletin of the British Museum (Natural History) Entomology 32 (4):139-170. (distribution). - As Psyllaephagus vectius: - 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 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198. (distribution). - As Syrphophagus vectius: - Ashmead, 1900Ashmead, W.H. 1900. On the genera of the Chalcidid-flies belonging to the subfamily Encyrtidae. Proceedings of the United States National Museum 22:323-412. (distribution).
Encyrtus solus Howard, 1885:15, ♀. Holotype ♀, Gainesvilkle, Fla., bred March 14, 1879 (Coll. C.V. Riley); Ashmead, 1900Ashmead, W.H. 1900. On the genera of the Chalcidid-flies belonging to the subfamily Encyrtidae. Proceedings of the United States National Museum 22:323-412.:381, Type ♀ (U.S.N.M., No. 2637). - Howard, 1885Howard, L.O. 1885. Descriptions of North American Chalcididae from the collections of the U. S. Department of Agriculture and of Dr. C. V. Riley. Bulletin of the U. S. Department of Agriculture 5:3-47. (distribution); Ashmead, 1887Ashmead, W.H. 1887. Studies on the North American Chalcididae, with descriptions of new species, chiefly from Florida. Trans. Am. Entomol. Soc. Phil. 14:183-203. (distribution); Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, V. Chalcididae et Proctotrupidae. Sumptibus Guilelmi Engelmann, VII + 598. (distribution); 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 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198.:960 ( listed as synonym of Psyllaephagus vectius (Walker, 1847)). - As Sceptrophorus solus: