@inbook{IRMNG:SourceID:109220, author = {Krombein, K. V. and Hurd, P. D., Jr. and Smith, D. R. and Burks, B. D. (eds.)}, title = {Catalog of Hymenoptera in America North of Mexico. Volume 2: Apocrita (Aculeata). Smithsonian Institution Press, Washington, D.C., 2209 pp.}, url = {https://www.irmng.org/aphia.php?p=sourcedetails&id=109220}, year = {1979} }