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 Lehmensick R., Stein G., 1958: Biologische Beobachtungen an einem polygynen Nest von Bombus hypnorum L. 15 pp. 

 Lehr P. A., (ed.), 1995: Megaloptera, Raphidioptera, Neuroptera, Mecoptera, Hymenoptera. [Guide to the insects of the Far East of Russia, vol. 4(1).] 606 pp. (in Russian). 

 Lehrer A. Z., Lehrer M., 1965: Catalogue systematique, synonymique et zoogeographique de la super-famille Pompiloidea Berland 1951 (Hymenoptera) de la Roumanie. 40 pp. 

 Lehrer A. Z., Scutaru M., 1963: Contribution a la connaissance des Sphecidae (Hym.) de Moldavie. 7 pp. 

 Lehrer A. Z., Scutaru M., 1963: Eumenidae, Pompilidae et Ceropalidae de la Moldavie (Hymenoptera, Aculeata). 13 pp. 

 Lehrer M., 1987: To be or not to be a colour-seeing bee. 26 pp. Israel Journal Ent. 21: 51-76.

 Leigh van Valen L., 1966: On discussing human races. 7 pp. 

 Leininger H., 1922: Beitraege zur Kenntnis der badischen Insektenfauna. 18 pp. 

 Leininger H., ?: Ein lateraler Zwitter von Odynerus reniformis Gmel. (Hym. Vespidae). 6 pp. 

 Lelej A. S., 1976: Dopolnenie k faune os-nemok (Hymenoptera: Mutillidae) Mongolii. 14 pp. 

 Lelej A. S., 1977: Novye dannye o faune os-nemok (Hymenoptera, Mutillidae) Mongolii. 11 pp. 

 Lelej A. S., 1980: The genus Pseudophotopsis André, 1896 (Hymenoptera, Mutillidae) from the USSR and adjacent countries. 16 pp. (in Russian). 

 Lelej A. S., 1983: On the velvet ants (Hymenoptera, Mutillidae) of Australia. 8 pp. (in Russian). 

 Lelej A. S., 1984: New palaearctic genera and species of the velvet ants (Hymenoptera, Mutillidae). 4 pp. (in Russian). 

 Lelej A. S., 1986: Dorožnye osy rodov Dipogon Fox i Poecilaageniella Ishikawa (Hymenoptera, Pompilidae) Dalnego Vostoka. 10 pp. 

 Lelej A. S., 1992: Two interesting species of velvet ants from China (Hymenoptera, Mutillidae). 8 pp. [M23] Entomofauna 13/19: 281-288.

 Lelej A. S., 1996: A review of the East Asian species of Mickelomyrme Lelej, 1995 (Hymenoptera, Mutillidae). 14 pp. Entomofauna 17/15: 277-290.

 Lelej A. S., Standfuss L., Standfuss K., 2003: To the knowledge of the mutillid wasps of Greece (Hymenoptera, Mutillidae). 20 pp. Entomofauna 24/6: 121-140.

 Lelej A. S., Standfuss L., Standfuss K., 2003: To the knowledge of the mutillid wasps of Greece (Hymenoptera, Mutillidae): Addition. 3 pp. Entomofauna 24/21: 305-307.

 Lemarie J., 1959: Erster Beitrag zur Kenntnis der Parasiten von Exoteleia dodecella L. (Hymenoptera: Chalcidoidea; Proctotrupoidea; Bethyloidea). Mit 1 Textfig., 5 pp. 

 Lemarie J., 1959: Erster Beitrag zur Kenntnis der Parasiten von Exoteleia dodecella L. (Hymenoptera: Chalcidoidea; Proctotrupoidea; Bethyloidea). Mit 1 Textfig., 5 pp. [HYM2293] Beiträge zur Entomologie 9(7-8): 805-809.

 Lensky Y., Kalinsky B., 1971: Haemolymph proteins of the honey bee – III. Presence of drones‘ haemolymph proteins in the reproductive organs. 16 pp. Israel Journal Ent. 6(1): 81-96.

 Lenteren J. C., Bakker K., 1975: Discrimination between parasitised and unparasitised hosts in the parasitic wasp Pseudeucoila bochei: a matter of learning. 2 pp. 

 Lenteren J. C., Bakker K., 1978: Behavioural aspects of the functional responses of a parasite (Pseudeucoila bochei Weld) to its host (Drosophila melanogaster). 21 pp. 

 Leo P., Fancello L., 1990: Osservazioni sul genere Leptanilla Emery in Sardegna e riabilitazione di L. doderoi emery (Hymenoptera Formicidae Leptanillinae). 5 pp. 

 Lesne P., 1891: Braconide du genre Perilitus Nees. 4 pp. 

 LeVeque N., 1928: Carpenter bees of the genus Mesotrichia obtained by the American Museum Congo Expedition, 1909 – 1915. 23 pp. 

 Levin M. D., 1957: Artifical nesting burrows for Osmia lignaria Say. 2 pp. 

 Lewis F. B., 1960: Factors Affecting Assessment of Parasitization by Apanteles fumiferanae Vier. and Glypta fumiferanae (Vier.) on Spruce Budworm Larvae. 11 pp. 

 Lewis T., 1975: Colony size, density and distribution of the leaf-cutting ant, Acromyrmex octospinosus (Reich) in cultivated fields. 14 pp. 

 Lichtenstein J. L., 1920: Description du male d’Acroricnus melanoleucus Grav. (Hym. Ichneumonidae). 5 pp. 

 Lichtenstein J. L., Picard F., 1918: Étude morphologique et biologique du « Sycosoter lavagnei » Picard et J. L. Licht., hecabolide parasite de l’ »Hypoborus ficus » Er. 35 pp. 

 Lichtenstein J. L., Picard F., ?: Notes biologiques sur les braconides (Hym.). 3 pp. 

 Lichtwardt B., 1919: Die Nemestriniden des Ungarischen Nationalmuseums in Budapest. 5 pp. 

 Lieftinck M. A., 1932: Remarks upon the early stages of Aulacodes crassicornalis (Guen.) an its parasite Rhachioplex javanicus Ferriére. 6 pp. 

 Lieftinck M. A., 1957: Revision of the carpenter-bees (Xylocopa Latr., subgenus Maiella Michener) of the Papuan region. 52 pp. 

 Lieftinck M. A., 1958: A preliminary account of the bees of the Canary Islands (Hym., Apoidea). 33 pp. 

 Lieftinck M. A., 1958: The identity of some Fabrician types of bees (Hymenoptera, Apoidea). II. One Amegilla Friese and two species of Megachile Latr. 5 pp. 

 Lieftinck M. A., 1964: The identity of Apis aestuans Linné, 1758, and related Old World carpenter-bees (Xylocopa Latr.). 24 pp. 

 Lieftinck M. A., 1977: Notes on the melectine genus Paracrocisa Alfken, with a new record of P. sinaitica Alfken (Hymenoptera, Anthophoridae). 3 pp. 

 Liljencrantz A., 1957: Ichneumon saltator par Charles de Geer 1757. 12 pp. 

 Lim J., Terayama M., Shin S., Lee S., 2010: Taxonomic notes on the genus Holepyris (Hymenoptera: Bethylidae) from Korea with descriptions of six new species. 11 pp. Entomological Science 13(3): 334-344.

 Lima A. C., 1951: Espécies de Eiphosoma Cresson (Hymenopt. Ichneum. Ophion.). 20 pp. 

 Lima da C. A., 1938: Sobre dois Calcidideos parasitos de larvas de Curculionidae (Hymenoptera: Pteromalidae, Pteromalinae). 5 pp. 

 Lima da Costa A., Guitton N., 1961: Sobre dois Icneumonideos Brasileiros. 9 pp. 

 Lin K. S., 1989: The genus Ropronia (Hymenoptera: Roproniidae) from Fukien, China. 4 pp. 

 Lin K. S., 1989: The genus Ropronia (Hymenoptera: Roproniidae) from Fukien, China. 4 pp. [HYM 6654] Journal of Taiwan Museum 42(2): 13-16.

 Lin N., 1963: Observations of suspected density dependent fighting between females of the cicada killer wasp Sphecius speciosus. 3 pp. 

 Lin N., 1963: Territorial behavior in the cicada killer wasp, Sphecius speciosus (Drury) (Hymenoptera: Sphecidae). I. 17 pp.