Roman A., 1932: The Linnean types of Ichneumon flies. 16 pp. 

 Roman A., 1936: Die Ichneumoniden des noerdlichen Norwegens. 25 pp. 

 Romand M., 1838: Description d’une nouvelle espéce de Paxyllomme. 3 pp. 

 Romasenko L. P., 1992: The prepupae of the genera Chalicodoma Lep. and Megachile Latr. (Hymenoptera, Apoidea, Megachilidae). 11 pp. (in Russian). Entomologitsheskoe obozrenie 71(3): 646-656.

 Romasenko L. P., Banaszak J., 2002: Notes on the specific status of Chalicodoma saussurei (Radoszkowski, 1874) (Hymenoptera: Apoidea: Megachilidae). 8 pp. [HYM4657] Genus 13(3): 397-404.

 Romasenko L., Banaszak J., Cierzniak T., 2005: Redescription of Andrena (Graecandrena) schwarzi Warncke, 1975 and A. (G.) walishanovi Osytshnjuk, 1994 (Hymenoptera: Apoidea: Andrenidae). 10 pp. [53793] Genus 16(1): 119-128.

 Rome Q., Muller F., Gargominy O., Villemant C., 2009: Bilan 2008 de l’invasion de Vespa velutina Lepeletier en France (Hymenoptera, Vespidae). 6 pp. (in French). Bulletin de la Société entomologique de France 114(3): 297-302.

 Ronquist F., 1995: Phylogeny and early evolution of the Cynipoidea (Hymenoptera). 27 pp. Systematic Entomology 20(4): 309-335.

 Roques A., Sun J.-H., Pan Y.-Z., Zhang X.-D., 1995: Contribution to the knowledge of seed chalcids, Megastigmus spp. (Hymenoptera: Torymidae), in China, with the description of three new species. 13 pp. Mitt. Schweiz. entomol. Ges. 68(1-2): 211-223.

 Rosa P., 2002: I crisidi (Hymenoptera, Chrysididae) della Valle d’Aosta. Check-list e note introduttive. 7 pp. (in French). Rev. valdotaine hist. nat. 56: 59-65.

 Rosa P., 2003: Cleptes (Leiocleptes) mareki n. sp., from China (Hymenoptera Chrysididae Cleptinae). 8 pp. (in English). Atti Soc. it. Sci. nat. Museo civ. Stor. nat. Milano 144(2): 407-414.

 Rosa P., 2003: I crisidi (Hymenoptera, Chrysididae) della Romagna. Stato attuale delle conoscenze. 12 pp. (in Italian). Ann. Mus. civ. St. nat. Ferrara 6: 29-40.

 Rosa P., 2004: Alcune osservazioni sulle relazioni tra Vegetazione e Crisidi (Hymenoptera, Chrysididae) in Italia. 12 pp. (in Italian). G. it. Ent. 11: 79-90.

 Rosa P., 2004: Chrysis schmideggeri n. sp., a new cuckoo-wasp of the Chrysis rubricata-group (Hymenoptera, Chrysididae). 13 pp.(in English). Atti Soc. it. Sci. nat. Museo civ. Stor. nat. Milano 145(2): 307-319.

 Rosa P., 2004: Gli Imenotteri Crisidi (Hymenoptera, Chrysididae) della collezione campadelli. 10 pp. (in Italian). Ann. Mus. civ. St. nat. Ferrara 7: 87-96.

 Rosa P., 2009: Catalogo dei tipi dei Crisidi del Museo civico di Storia naturale “G. Doria” di Genova (Hymenoptera, Chrysididae). 64 pp. (in Italian). Annali del Museo civico di Storia naturale Giacomo Doria 100: 209-272.

 Rosanov I. V., 1969: Pereopisanie Chartocerus musciformis Motschulsky (Hymenoptera, Signiphoridae), vyvedennogo iz mučnistogo červeca (Pseudococcidae) s kofeinogo dereva na Cejlone. 3 pp. 

 Rose A. H., Sippell W. L., 1966: Distribution of cocoon parasites of the European pine sawfly, Neodiprion sertifer (Geoffroy) in Southern Ontario. 6 pp. 

 Rose M., Rosen D., 1992: Eretmocerus debachi n. sp. (Hymenoptera: Aphelinidae), an effective parasite of Parabemisia myricae (Homoptera: Aleyrodidae). 9 pp. Israel Journal Ent. 26-27(1991-1992): 199-207.

 Rosen D., 1965: A new species of Clausenia Ishii (Hymenoptera: Encyrtidae) from Israel. 7 pp. 

 Rosen D., 1967: The hymenopterous parasites of soft scales on citrus in Israel. 29 pp. (in English). Beiträge zur Entomologie 17(1-2): 251-279.

 Rosenheim J. A., Grace J. K., 1987: Biology of a wood-nesting wasp, Mimumesa mixta (W. Fox) (Hymenoptera: Sphecidae), and its parasite, Elampus viridicyaneus Norton (Hymenoptera: Chrysididae). 5 pp. Proc. Entomol. Soc. Wash. 89(2): 351-355.

 Rosenheim J. A., Hoy M. A., 1988: Genetic improvement of a parasitoid biological control agent: Artificial selection for insecticide resistance in Aphytis melinus (Hymenoptera: Aphelinidae). 12 pp. 

 Ross J., 1946: Cynipid flies and galls on Oak. 16 pp. 

 Ross J., 1951: A study of some British species of Synergus (Hymenoptera, Cynipoidea). 16 pp. 

 Rossem G. van, 1983: A revision of Western Palaearctic Oxitorine genera. Part IV. Genus Megastylus (Hymenoptera, Ichneumonidae). 12 pp. [M20] Entomofauna 4/8: 121-132.

 Rossem G., 1989: Supplementary notes on the genus Trychosis. Mitteilungen der münchner entomologischen Gesellschaft 79: 101-110.

 Rössler Y., DeBach P., 1972: The biosytematic relations between a thelytokous and an arrhenotokous form of Aphytis mytilaspidis (le Baron) (Hymenoptera: Aphelinidae). 2. Comparative biological and morphological studies. 11 pp. 

 Rossum A. J., 1871: Sur le liquide des larves de Cimbex. 4 pp. 

 Rothney G. A. J., 1903: The Aculeate Hymenoptera of Barrackpore, Bengal. 22 pp. 

 Rotshild E. V., Soldatkin I. S., Rudenchik Yu. V., Sedin V. I., 1977: Muravi – potrebiteli trupov gryzunov v prirodnych očagach boleznej aridnych rajonov. 7 pp. 

 Roubaud , 1910: The natural history of the solitary wasps of the genus Synagris. 23 pp. 

 Roubaud E., 1910: Recherches sur la Biologie des Synagris (Hymén.). 25 pp. [M59] 

 Rozalski R. J., Sakurai H., Tsuchida K., Inoue A., 1996: Esterase and malate dehydrogenase isozymes analysis in the population of honeybee, Apis cerana japonica and Apis mellifera. 8 pp. Pp. 910-917.

 Rozen Jr. J. G., 1963: Notes on the Biology of Nomadopsis, with Descriptions of Four New Species (Apoidea, Andrenidae). 17 pp. 

 Rozen Jr. J. G., 1964: The Biology of Svastra obliqa obliqua (Say) with a Taxonomic Description of its Larvae (Apoidea, Anthophoridae). 13 pp. 

 Rozen Jr. J. G., 1965: The biology and immature stages of Melitturga clavicornis (Latreille) and of Sphecodes albilabris (Kirby) and the recognition of the Oxaeidae at the family level (Hymenoptera Apoidea). 18 pp. 

 Rozen Jr. J. G., 1965: The Larvae of the Anthophoridae (Hymenoptera, Apoidea) Part 1. Introduction, Eucerini, and Centridini (Anthophorinae). 27 pp. 

 Rozen Jr. J. G., 1966: Systematics of the larvae of North American panurgine bees (Hymenoptera, Apoidea). 22 pp. 

 Rozen Jr. J. G., 1966: The larvae of the Anthophoridae (Hymenoptera, Apoidea) Part 2. The Nomadinae. 38 pp. 

 Rozen Jr. J. G., 1967: Review of the biology of panurgine bees, with observations on North American forms (Hymenoptera, Andrenidae). 44 pp. 

 Rozen Jr. J. G., 1968: Biology and Immature Stages of the Aberrant Bees genus Meliturgula (Hymenoptera, Andrenidae). 18 pp. 

 Rozen Jr. J. G., 1969: The biology and description of a new species of African Thyreus, with life history notes on two species of Anthophora (Hymenoptera: Anthophoridae). 10 pp. 

 Rozen Jr. J. G., 1970: Biological observations on the parasitic bee Kelita (Hymenoptera: Apoidea). 2 pp. 

 Rozen Jr. J. G., 1986: Survey of the number of ovarioles in various taxa of bees (Hymenoptera: Apoidea). 4 pp. Proc. Entomol. Soc. Wash. 88(4): 707-710.

 Rozen Jr. J. G., 1991: Nesting biology and mature larva of the bee Idiomelissodes duplocincta (Hymenoptera: Anthophoridae: Eucerini). 11 pp. 

 Rozen Jr. J. G., Ayala R., 1987: Nesting biology of the squash bee Peponapis utahensis (Hymenoptera, Anthophoridae, Eucerini). 6 pp. 

 Rozen Jr. J. G., Michener C. D., 1968: The biology of Scrapter and its cuckoo bee, Pseudodichroa (Hymenoptera: Colletidae and Anthophoridae). 13 pp. 

 Ruano F., Tinaut A., Sanllorente O., Fernández-Zambrano A., 2007: Nuevas localidades para Rossomyrmex minuchae Tinaut, 1981 (Hymenoptera, Formicidae). 4 pp. (in Spanish). Boletin de la Asociación espanola de Entomología 31(1-2): 209-212.

 Rubtsov I. A., 1953: Evkomis – effektivnyj parazit mjagkoj ložnoščitovki. 11 pp.