Sigwalt B., 1978: The genus Phanerotomella Szepligeti. General remarks. New species of south-east Asia. (Hymenoptera, Braconidae). 11 pp. (in French). [HYM 5092]  Annales de la Societe entomologique de France (N.S.) 14(4): 715-725.

 Sigwalt B., Pointel J. G., 1980: Specific status and separation of the Apanteles flavipes complex (Hym. Braconidae) utilized in biological pest control. 10 pp. (in French). [HYM 5093]  Annales de la Societe entomologique de France (N.S.) 16(1): 109-128.

 Silberglied R. E., Eisner T., 1969: Mimicry of Hymenoptera by beetles with unconventional flight. 3 pp. 

 Silva Torres C. S. A. da, Matthews R. W., Ruberson J. R., Lewis W. J., 2005: Role of chemical cues and natal rearing effect on host recognition by the parasitic wasp Melittobia digitata. 8 pp. Entomol. Sci. 8(4): 355-362.

 Silva Torres C. S. A. da, Matthews R. W., Ruberson J. R., Lewis W. J., 2005: Role of chemical cues and natal rearing effect on host recognition by the parasitic wasp Melittobia digitata. 8 pp. Entomological Science 8(4): 355-362.

 Silveira O. T., Esposito M. C., Santos J. N. Jr, Gemaque F. E. Jr, 2005: Social wasps and bees captured in carrion traps in a rainforest in Brazil. 7 pp. Entomological Science 8(1): 33-39.

 Silvestri F., 1916: Contribuzione alla conoscenza del genere Poropoea Förster (Hymenoptera, Chalcididae). 16 pp. 

 Silvestri F., 1918: Contribuzione alla conoscenza del genre Centrobia Förster (Hymenoptera, Chalcididae). 7 pp. 

 Simbolotti G., Achterberg C. van, 1992: Revision of the West Palaearctic species of the genus Bassus Fabricius (Hymenoptera: Braconidae). 80 pp. Zoologische Verhandelingen.

 Simbolotti G., Achterberg C. van, 1999: Revision of the West Palaearctic species of the genus Agathis Latreille (Hymenoptera: Braconidae: Agathidinae). 167 pp. Zoologische Verhandelingen.

 Simbolotti G., Villemant C., Achterberg C. van, 2004: Notes on the genus Mama Belokobylskij (Hymenoptera: Braconidae: Euphorinae), and on the use of monotype taxa. 9 pp. 

 Simmonds F. J., 1948: The biology of parasites of Loxostege sticticalis L. in North America. IV: Cryptus inornatus Pratt (Ichneumonidae, Cryptinae). 9 pp. 

 Simpson J., 1957: Observations on colonies of honey-bees subjected to treatments designed to induce swarming. 8 pp. 

 Simpson J., 1958: The factors which cause colonies of Apis mellifera to swarm. 19 pp. 

 Simpson J., 1963: Queen perception by honey bee swarms. 3 pp. 

 Singh D., Saini M. S., 1987: Five new species of Tenthredo Linnaeus from Uttarkhand area (India) (Hymenoptera: Tenthredinidae). 9 pp. Deutsche entomologische Zeitschrift (N.F.) 34(4-5): 397-405.

 Singh D., Saini M. S., 1988: Five new species of Tenthredo Linnaeus from the Eastern Himalayas (Hymenoptera, Tenthredinidae). 8 pp. Deutsche entomologische Zeitschrift (N.F.) 35(4-5): 387-394.

 Singh D., Saini M. S., 1988: Six new species of Tenthredo Linn. from the Western Himalayas (Insecta, Hymenoptera, Symphyta, Tenthredinidae). 11 pp. Reichenbachia 25(2): 137-147.

 Singh R., Srivastava M., 1987: Bionomics of Trioxys indicus Subba Rao & Sharma, an aphidiid parasitoid of Aphis craccivora Koch. 25. The role of host haemolymph in the host stage preference by the parasitoid. 4 pp. Giornale Italiano di Entomologia 17(3): 409-412.

 Sinha , Michener , 1958: A revision of the genus Osmia, subgenus Centrosmia (Hymenoptera: Megachilidae). 29 pp. 

 Sioli E., 1996: Die Phytophagenfauna der Krautschicht (Cicadina, Heteroptera und Symphyta) verschiedener Waldtypen Schleswig-Holsteins. 94 pp. Faun.-Ökol. Mitt. Suppl. 21

 Sitdikov A. A., Pesenko Y. A., 1988: Podrodovaja klassifikacija pčel roda Eucera Scopoli (Hymenoptera, Anthophoridae) so schemoj filočenetičeskich otnoščenii meždu podrodami. 27 pp. 

 Sitdinov A. A., 1987: Nesting of the bee Halictus quadricinctus (F.) (Hymenoptera, Halictidae) in the Udmurt ASSR. 11 pp. (in Russian). Entomologitsheskoe obozrenie 66(3): 529-539.

 Six G. A., 1876: Opmerkingen omtrent zes merkwaardige inlandsche Pteromalinen en eene Proctotrupide. 5 pp. 

 Skorikova O. A., 1953: K biologii pililshtshkov (Hymenoptera, Tenthredinidae), vredjashtshikh smorodine i krizhovniku v Leningradskoj oblasti. 4 pp. (in Russian). Entomologitsheskoe obozrenie 33: 128-131.

 Skrzypczynska M., 1974: O wystepowaniu samców znamionka modrzewiowca – Megastigmus pictus (Foerst.) (Hym., Torymidae). 6 pp. [M44] 

 Skwarra E., 1930: Ameisen und Ameisenpflanzen im Staate Veracruz (Mexiko). 11 pp. 

 Sláma K., 1959: Celková látková přeměna v průběhu larválního vývoje některých druhů pilatek (Hym., Tenthredinoidea). 13 pp. [M44] 

 Sláma K., 1959: Celková látková přeměna v průběhu larválního vývoje některých druhů pilatek (Hym., Tenthredinoidea). 13 pp. [M44] [HYM 3594] Acta Societatis entomologicae Cechosloveniae 56: 113-125.

 Sláma K., 1964: Physiology of sawfly metamorphosis. 2. Hormonal activity during diapause and development. 10 pp. [HYM 3595] Acta Societatis entomologicae Cechosloveniae 61: 210-219.

 Slavíček J., : Zwei Hymenopterenzwitter. 2 pp. 

 Slepyan E. I., Gabaraeva N. I., 1981: Structure and development of the gall caused by the larva of the sawfly Pontania proxima (Lepel.) (Hymenoptera, Tenthredinidae) on the leaf of the willow Salix fragilis L. 7 pp. (in Russian). Entomologitsheskoe obozrenie 60(3): 550-556.

 Smalian C., 1894: Altes und Neues dem Leben der Ameisen. 46 pp. 

 Smit J. T., Smit J., 2003: Hylaeus signatus (Panzer, 1798) new for the fauna of Madeira, with notes on its feeding behaviour (Hymenoptera: Apidae). 4 pp. [M23] Entomofauna 24/11: 165-168.

 Smith , 1861: Descriptions of some new species of Hymenopterous insects belonging to the families Thynnidae, Masaridae and Apidae. 11 pp. 

 Smith D. R., 1969: Nearctic sawflies. I. Blennocampinae: Adults and larve (Hymenoptera: Tenthredinidae). 208 pp. 

 Smith D. R., 1972: North American sawfly larvae ofthe family Argidae (Hymenoptera). 22 pp. 

 Smith D. R., 1975: The sawfly genus Hemichroa Stephens: A review of species (Hymenoptera: Tenthredinidae). 6 pp. 

 Smith D. R., 1979: Nearctic sawflies. IV. Allantinae: Adults and larvae (Hymenoptera: Tenthredinidae). 196 pp. 

 Smith D. R., 1982: List of the Symphyta (Hymenoptera) of Israel, with description of four new species. 25 pp. Israel Journal Ent. 16: 1-25.

 Smith D. R., 1991: Flight records for twenty-eight species of Macrophya Dahlbom (Hymenoptera: Tenthredinidae) in Virginia, and an unusual specimen of M. epinota (Say). 4 pp. Proc. Entomol. Soc. Wash. 93(3): 772-775.

 Smith D. R., Adis J., 1984: Notes on the systematics and natural history of Dielocerus fascinatus (Enderlein) and key to species of the genus (Hymenoptera: Argidae). 2 pp. Proc. Entomol. Soc. Wash. 86(3): 720-721.

 Smith D. R., Barrows E. M., 1987: Sawflies (Hymenoptera: Symphyta) in urban environments in the Washington, D. C. area. 10 pp. Proc. Entomol. Soc. Wash. 89(1): 147-156.

 Smith D. R., Naito T., 2005: A new species of Heterarthrus Stephens (Hymenoptera, Tenthredinidae) leafmining Salix spp. in Japan. 5 pp. Japanese Journal of systematic Entomology (N.S.) 11(2): 189-193.

 Smith D. R., Wagner M. R., 1986: Recognition of two species in the úpine feeding „Neodiprion fulviceps complex“ (Hymenoptera: Diprionidae) of Western United States. 6 pp. Proc. Entomol. Soc. Wash. 88(2): 215-220.

 Smith F., 1871: A catalogue of British Hymenoptera. Aculeata. 50 pp. 

 Smith K. G. V., 1956: Antennal teratology in Tenthredopsis nassata L. (Hym., Tenthredinidae). 2 pp. [M43] 

 Smith M. R., 1957: Revision of the genus Stenamma Westwood in America North of Mexico (Hymenoptera, Formicidae). 42 pp. 

 Smith O. J., 1952: Biology and behavior of Microctonus vittatae Muesebeck (Braconidae). 29 pp. 

 Smith O. J., Compere H., 1926: The establishment in California of Coccophagus modestus Silv. (Aphelinidae, Hymenoptera) with notes on its life-history. 11 pp.