Selected books: •
Monograph of the North American Proctotrypidae. (Bulletin of the US National Museum, no. 45) Washington: US GPO, 1893.*
Descriptions of New genera and species of Hymenoptera from the Philippine Islands. (Proceedings of the US National Museum, no. 29) Washington: US GPO, 1904.[https://www.biodiversitylibrary.org/item/53438#page/11/mode/1up Selected articles on the Order Hymenoptera: • "Studies on the North American Proctotrupidae, with descriptions of new species from Florida."
Entomol. Am. 3: 73–76, 97–100, 117–119 (1887). • "Descriptions of some new genera and species of Canadian Proctotrupidae."
Can. Entomol. 20: 48–55 (1888). • "Description of a new genus and new species of proctotrypid bred by Mr F.W. Urich from an embiid."
J. Trin. Fld. Nat. Club 2: 264-266 (1895). • "The phylogeny of the Hymenoptera".
Proc. Ent. soc. Washington, III: 326-336 (1896) . • "Classification of the pointed-tailed wasps, or the superfamily Proctotrypoidea.-III."
J. N. Y. Entomol. Soc. 11: 86-99 (1903). • "Descriptions of new Hymenoptera from Japan-1."
J. N. Y. Entomol. Soc. 12: 65-84 (1904). • ==External links==