Transactions of the American Entomological Society (1867 : Online)
American Entomological Society.
Academy of Natural Sciences of Philadelphia. Entomological Section.
Vol. 7 (1878/1879)-v. 16, no. 4 (1889).
Title from volume title page (JSTOR, viewed Feb. 24, 2009).
Has supplementary volume dated 1887 with title: Synopsis of the families and genera of the hymenoptera of America, north of Mexico, together with a catalogue of the described species, and bibliography / by E.T. Cresson.
Mode of access: World Wide Web.