Rohdendrorf B. B., 1951: Organy dvizhenija dvukrylych nasekomych i ich proischozhdenie. [Locomotory organs of Diptera and their origin.] 173 pp. (in Russian).  Discount 20%!

 Rohe W., Rupprecht R., 2001: Klopfen und Kratzen als Alarmsignale bei westmalayischen Drüsenameisen (Hymenoptera: Formicidae: Dolichoderinae). 16 pp.(in English). Entomol Gener 25(2): 81-96.

 Rohlfien K., Ewald B., 1970: Katalog der in den Sammlungen des ehemaligen Deutschen Entomologischen Institutes aufbewahrten Typen. VIII. Diptera: Schizophora: Cyclorrhapha: Acalyptratae. 63 pp. [61116] Beiträge zur Entomologie 22(7-8): 407-469.

 Rohlfien K., Ewald B., 1974: Katalog der in den Sammlungen des ehemaligen Deutschen Entomologischen Institutes aufbewahrten Typen – XI. (Diptera: Cyclorrphapha, Schizophora, Calyptratae). [Catalogue of the types preserved in the collections of the former Deutsches Entomologisches Institut – XI. (Diptera: Cyclorrhapha, Schizophora, Calyptratae)]. 41 pp. [63459] Beiträge zur Entomologie 24(1-4): 107-147.

 Rohlfien L., Ewald B., 1975: Katalog der in den Sammlungen des ehemaligen Deutschen Entomologischen Instituts aufbewahrten Typen – XIII. (Diptera:Cyclorrhapha: Aschiza). [Catalogue of the types in the collections of the former Deutsches Entomologisches Institut – XIII. (Diptera: Cyclorrhapha: Aschiza)]. 11 pp. [63460] Beiträge zur Entomologie 25(1): 151-161.

 Rohlfs M., Hoffmeister T. S., 2000: Warum legen Drosophila-Individuen ihre Eier aggregiert ab 4 pp. (in German). Mitt. Dtsch. Ges. Allg. Angew. Ent. 12: 505-508.

 Röhne E., nach 1909: Bilder-Atlas des Pflanzenreichs. 124 Farbendrucktafeln, 183 pp. Seiten 1-144 beschedigt von Wasser, Farbtafeln 122-125 mit Flecken. 

 Röhne E., nach 1909: Bilder-Atlas des Pflanzenreichs. 124 Farbendrucktafeln, 183 pp. Titelseite beschedigt. 

 Röhrborn G., 1962: Untersuchungen zur Phänogenetik der melanotischen Drosophila-Tumoren. 11 pp. [DIP 2911] Deutsche Entomologische Zeitschrift (N.F.) 9: 477-487.

 Rohrer F., 1919: Einleitung zu einer Allgemeinen theoretischen Morphologie als Grundlage einer theoretischen Biologie. 45 pp. (in German). 

 Röhrer-Ertl O., 1982: Über Subspezies bei Pongo pygmaeus, Linnaeus, 1760. 5 pp. Spixiana 5(3): 317-321.

 Röhrer-Ertl O., 1983: Zur Erforschungsgeschichte und Namengebung beim Orang-Utan, Pongo satyrus (Linnaeus, 1758); Synon. Pongo pygmaeus (Hoppius, 1763). Mit Kurzbibliographie. 32 pp. Spixiana 6(3): 301-332.

 Röhrer-Ertl O., 1983: Zur Erforschungsgeschichte und Namengebung beim Orang-Utan, Pongo satyrus (Linnaeus, 1758); Synon. Pongo pygmaeus (Hoppius, 1763). Mit Kurzbibliographie. 32 pp. [81086] Spixiana 6(3): 301-332.

 Rohwer S. A., 1911: Descriptions of new species of wasps with notes on described species. 37 pp. Proceedings U.S. National Museum Vol. 40, No. 1837: 551-587.

 Rohwer S. A., 1911: Japanese sawflies in the collection of the United States National Museum. 22 pp. 

 Rohwer S. A., 1911: On a collection of Tenthredinoidea from eastern Canada. 13 pp. 

 Rohwer S. A., 1911: On some Hymenopterous insects from the Island of Formosa. 9 pp. 

 Rohwer S. A., 1912: Sawflies from Panama, with descriptions of new genera and species. 6 pp. 

 Rohwer S. A., 1913: Descriptions of thirteen new species of parasitic Hymenoptera and a table to certain species of the genus Ecphylus. 8 pp. 

 Rohwer S. A., 1913: New parasitic Hymenoptera Belonging to the tribe Xoridini. 9 pp. 

 Rohwer S. A., 1913: Notes on sawflies, with descriptions of new species. 47 pp. 

 Rohwer S. A., 1914: Vespoid and Sphecoid Hymenoptera collected in Guatemala by W. P. Cockerell. 11 pp. 

 Rohwer S. A., 1915: Synopsis of the species of sawflies belonging to the genus Dimorphopteryx. 4 pp. 

 Rohwer S. A., 1916: Descriptions of new species of Hymenoptera. 45 pp. 

 Rohwer S. A., 1917: A report on a collection of Hymenoptera (mostly from California) made by W. M. Giffard. Pl. 33, 22 pp. 

 Rohwer S. A., 1917: Descriptions of thirty one new species of Hymenoptera. 26 pp. 

 Rohwer S. A., 1919: Descriptions and notes on some Ichenumon – flies from Java. 8 pp. 

 Rohwer S. A., 1920: Descriptions of twenty-six new species of North American Hymenoptera. 22 pp. 

 Rohwer S. A., 1920: Three new species of Indian Drynnid parasites of rice leaf-hoppers. 4 pp. 

 Rohwer S. A., 1921: Descriptions of twenty-five new species of North American Hymenoptera. 23 pp. 

 Rohwer S. A., 1922: Notes and descriptions of neotropical sawflies of the subfamily Perreyiinae. 7 pp. 

 Rohwer S. A., 1922: Notes on sawflies, with descriptions of new genera and species. 27 pp. 

 Rohwer S. A., 1922: Some notes on wasps of the subfamily Nyssoninae, with descriptions of new species. 11 pp. 

 Rohwer S. A., 1923: New Hymenoptera from the Malayan region. 9 pp. 

 Rohwer S. A., 1925: Sawflies from the Maritime Province of Siberia. 12 pp. 

 Rohwer S. A., 1927: Two European sawflies of the genus Emphytina found in the United States (Hym.). 2 pp. 

 Rohwer S. A., Fagan M. M., 1920: Additions and corrections to “The type species of the genera of the Cynipoidea or the gall wasps and parasitic cynipoids.” 4 pp.  

 Rohwer S. A., Fagan M., 1917: The type-species of the genera of the Cynipoidea, or the gall wasps parasitis Cynipoids. 24 pp. 

 Rohwer S. A., Fagan M., 1919: Additions and corrections to “the type-species of the genera of the Cynipoidea or the gall wasps and parasitic Cynipoids”. 4 pp. 

 Rohwer S. A., Middleton W., 1922: North American sawflies of the subfamily Cladiinae. Notes on habits and descriptions of larvae. 53 pp. 

 Roi O., 1912: Zur Kenntnis der Plecopteren von Rheinland-Westfalen. 28 pp. 

 Roi O., : Zur Fauna des Vereinsgebietes. 6 pp. 

 Roig-Alsina A., 1994: Meliphilopsis, a new genus of emphorine ees, and notes on the relationships among the genera of Emphorina (Insecta: Hymenoptera: Apoidea: Apidae). 8 pp. (in English). Reichenbachia 30(2): 181-188.

 Roig-Alsina A., 2003: A revision of the bee genus Tapinotaspis Holmberg (Hymenoptera: Apidae, Tapinotaspidini). 9 pp. Mitteilungen der münchner entomologischen Gesellschaft 93: 45-53.

 Roig-Junent S., Scheibler E., 2004: A new species of Pericompsus LeConte (Carabidae: Bembidiini, Tachyina) from Argentina. 5 pp. The Coleopterists Bulletin 58(3): 311-315.

 Roisin Y., 1992: Development of non-reproductive cates in the neotropical termite genera Corniterms, Embiratermes and Rhynchotermes (Isoptera, Nasutitermitinae). 12 pp. 

 Roitberg B., 1993: Towards a general theory of host acceptance by aphid parasitoids. 8 pp. 

 Rojanavongse V., Robinson A. G., 1976: Neartic species of Aphis L. (Homoptera: Aphididae) on Umbelliferae, with a akey to those found in Manitoba. 4 pp. 

 Rojanavongse V., Robinson A. G., 1977: Specis of Aphis (Homoptera: Aphididae) in Manitoba, with a key, and descriptions of new species. 13 pp. 

 Rojas M. de, Úbeda J. M., Guevara D. C., Ariza C., 1993: Estudio de cinco especies de ácaros plumícolas del género Proctophyllodes Robin, 1877 (Acarina, Proctophyllodidae) parásitas de aves paseriformes espanolas (2 fig.). [Study of five species of feather mites genus Proctophyllodes Robin, 1877 (Acarina, Proctophyllodidae) parasitic on Spanish paseriform birds.] 6 pp. Bol. R. Soc. Esp. Hist. Nat. (Sec. Biol.) 90(1-4): 55-60.