Catalog of hymenoptera in America North of Mexico (1979): Prepared under the direction ofK.V. Krombein, P.D. Hurd, Jr.,D.R. Smith andB.D. Burks, Smithsonian Institution Press, Washington, D.C. Volume 1: Symphyta and Apocrita (Parasitica), XVI+1198 pp. (U.S. $ 30.00); Volume 2: Apocrita (Aculeata), pp. 1199–2209 (U.S. $ 28.00); Volume 3: Indexes, XXX+pp. 2211–2735 (U.S. $ 20.00)