Krombein K. V., 1962: Natural history of plummers Island, Maryland. XVI. Biological notes on Chaetodactylus krombeini Baker, a parasitic mite of the megachilid bee, Osmia (Osmia) lignaria Say (Acarina: Chaetodactylidae). 14 pp. 

 Krombein K. V., 1963. Biological notes on Cerceris blakei Cresson (Hymenoptera: Sphecidae). 8 pp. 

 Krombein K. V., 1963: A new Chrysura from Plummers Island, Maryland (Hymenoptera, Chrysididae). 4 pp. 

 Krombein K. V., 1963: A new Nitelopterus from Wyoming and Washington (Hymenoptera, Sphecidae). 3 pp. 

 Krombein K. V., 1963: A new Tachysphex from Southeastern United States (Hymenotpear, Sphecidae). 5 pp. 

 Krombein K. V., 1963: Natural History of Plummers Island, Maryland. XVII. Annotated list of the wasps (Hymenoptera: Bethyloidea, Scolioidea, Vespoidea, Pompliloidea, Sphecoidea). 26 pp. 

 Krombein K. V., 1963: Notes on the Entomognathus of Eastern United States (Hymenoptera: Sphecidae). 8 pp. 

 Krombein K. V., 1964: Natural History of Plummers Island, Maryland. XVIII. The hibiscus wasp, an abundandt rarity, and its associates (Hymenoptera: Sphecidae). 40 pp. 

 Krombein K. V., 1964: Results of the Archbold Expeditions. No. 87 Biological Notes on Some Floridian Wasps (Hymenoptera, Aculeata). 27 pp. 

 Krombein K. V., 1967: A new Collembola-hunting Microstigmus with notes on M. guianensis Rohwer (Hymenoptera, Sphecidae). 4 pp. 

 Krombein K. V., 1967: A. W. Stelfox collection of Irish Hymenoptera donated to Smithsonian institution. 2 pp. 

 Krombein K. V., 1967: “Hymenoptera”. 11 pp. 

 Krombein K. V., 1968: A fifth species of Nitela from North America (Hymenoptera: Sphecidae). 4 pp. 

 Krombein K. V., 1968: Records and descriptions of additional Scoliidae from New Guinea, Bismarck Archipelago, and Solomon Islands (Hymenoptera: Aculeata). 19 pp. 

 Krombein K. V., 1968: Studies in the Tiphiidae, X. Hylomesa, a New Genus of Myzinine Wasp Parasitic on Larvae of Longicorn Beetles (Hymenoptera). 22 pp. 

 Krombein K. V., 1969: A revision of the Melanesian wasps of the genus Cerceris Latreille (Hymenoptera: Sphecidae). 36 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1969: Life history notes on some Egyptian solitary wasps and bees and their associates (Hymenoptera: Aculeata). 18 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1969: The generic placement of two nearctic Holopyga with biological notes (Hymenoptera: Chrysididae). 11 pp. 

 Krombein K. V., 1970: Another note on the nesting habits of Megachile texana Cresson (Hymenoptera: Megachilidae). 1 pp. 

 Krombein K. V., 1970: Behavioral and Life-History Notes on Three Floridian Solitary Wasps (Hymenoptera: Sphecidae). 26 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1971: A new wasp from Trinidad, predaceous on Curculionidae and Bruchidae (Hymenoptera: Sphecidae). 3 pp. 

 Krombein K. V., 1972: Miscellaneous prey records of solitary wasps. VI. Notes on some species from Greece (Hymenoptera: Aculeata). 3 pp. 

 Krombein K. V., 1973: A new Campsomeriella from New Ireland (Hymenoptera: Scoliidae). 1 pp. 

 Krombein K. V., 1973: Notes on North American Stigmus Panzer (Hymenoptera, Sphecoidea). 19 pp. 

 Krombein K. V., 1973: Systematic and distributional notes on Melanesian Cerceris (Hymenoptera: Sphecidae). 4 pp. 

 Krombein K. V., 1976: Lectotype designations for three new world Liris with taxonomic notes (Hymenoptera: Larridae). 3 pp. 

 Krombein K. V., 1979: Biosystematic studies of Ceylonese wasps, V: A monograph of the Ampulicidae (Hymenoptera: Sphecoidea). 29 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1979: Biosystematic studies of Ceylonese wasps. VI. Notes on the Sclerogibbidae with descriptions of two new species(Hymenoptera: Chrysidoidea). 10 pp. Proc. Entomol. Soc. Wash. 81(3): 465-474.

 Krombein K. V., 1980: Biosystematic studies of Ceylonese wasps. I. A preliminary revison of the Amiseginae (Hymenoptera: Chrysididae). 15 pp. 

 Krombein K. V., 1981: Biosystematic studies of Ceylonese wasps, VIII: A monograph of the Philanthidae (Hymenoptera: Sphecoidea). 75 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1981: The Smithsonian Insect project in Sri Lanka, 1969-1975. 17 pp. 

 Krombein K. V., 1982: Biosystematic studies of Ceylonese wasps. X: Taxonomic and biological notes on some Oxybelinae (Hymenoptera: Sphecoidea, Crabronidae). 9 pp. 

 Krombein K. V., 1983: Biosystematic studies of Ceylonese wasps, XI: A monograph of the Amiseginae and Loboscelidiinae (Hymenoptera: Chrysididae). 79 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1983: Three new egg parasites of South African walking sticks (Hymenoptera: Chrysididae, Amiseginae). 8 pp. 

 Krombein K. V., 1984: Biosystematic studies of Ceylonese wasps, XII: Behavioral and life history notes on some Sphecidae (Hymenoptera: Sphecoidea). 30 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1984: Biosystematic studies of Ceylonese wasps, XIII: A monograph of the Stizinae (Hymenoptera: Sphecoidea, Nyssonidae). 37 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1984: Biosystematic studies of Ceylonese wasps, XIV: A revision of Carinostigmus Tsuneki (Hymenoptera: Sphecoidea: Pemphredonidae). 37 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1984: Two new egg parasites of South African walking sticks and notes on two previously described specis (Hymenoptera: Chrysididae, Amiseginae). 5 pp. 

 Krombein K. V., 1985: Biosystematic studies of Ceylonese wasps, XV: a monograph of the Alyssoninae, Nyssoninae, and Gorytinae (Hymenoptera: Sphecoidea: Nyssonidae). 43 pp. Smithsonian Contributions to Zoology

 Krombein K. V., 1985: Oxybelus (Anoxybelus) maidlii Kohl, an Oxybelus with unusual features (Hymenoptera: Sphecoidea: Crabronidae). 7 pp. Proc. Entomol. Soc. Wash. 87(3): 634-640.

 Krombein K. V., 1986: Three cuckoo wasps from Siberian and Baltic amber (Hymenoptera: Chrysididae: Amiseginae and Elampinae). 8 pp. Proc. Entomol. Soc. Wash. 88(4): 740-747.

 Krombein K. V., 1987: Synonymic notes on the Bethylidae described by V. de Motschulsky (Hymenoptera: Aculeata). 3 pp. Proc. Entomol. Soc. Wash. 89(2): 356-358.

 Krombein K. V., 1996: Biosystematic studies of Ceylonese wasps, XXI: A revision of the Bethylinae and Epyrinae (Cephalonomiini and Sclerodermini) (Hymenoptera: Bethylidae). 29 pp. Smithsonian Contributions to Zoology

 Krombein K. V., Evans H. E., 1976: Three new neotropical Pterobrus with description of the diapausing larva (Hymenoptera: Tiphiidae). 8 pp. 

 Krombein K. V., Gingras S. S., 1984: Revision of North American Liris Fabricius (Hymenoptera: Sphecoidea: Larridae). 96 pp. Smithsonian Contributions to Zoology

 Krombein K. V., Kurczewski F. E., 1963: Biological notes on three Floridian wasps (Hymenoptera, Sphecidae). 14 pp. 

 Krombein K. V., Kurczewski F. E., 1963: Biological notes on three floridian wasps (Hymenoptera, Sphecidae). 14 pp. 

 Krombein K. V., Marsh P. M., 1988: Carl Frederick William Muesebeck, 1894-1987. 11 pp. Proc. Entomol. Soc. Wash. 90(4): 513-523.

 Krombein K. V., Mello J. F., Crockett J. J., 1974: The North America Hymenoptera Catalog: A Pioneering Effort In Computerized Publication. 6 pp. 

 Krombein K. V., Norden B. B., 1995: Notes on the behavior and taxonomy of Megachile (Xeromegachile) brimleyi Mitchell and its probable cleptoparasite, Coelioxys (Xerocoelioxys) Galactiae Mitchell (Hymenoptera: Megachilidae). 4 pp.