Krombein, Karl V. Biosystematic Studies of Ceylonese Wasps, XIX: Natural History Notes in Several Families (Hymenoptera: Eumenidae, Vespidae, Pompilidae, and Crabronidae). Smithsonian Contributions to Zoology, number 515, 41 pages, 59 figures, 1991.—Behavioral, ecological, and distributional data are provided for 40 species of Sri Lankan wasps in the families Eumenidae, Vespidae, Pompilidae, an...