Rheims C. A., Brescovit A. D., 2001: Three new species of litter inhabiting spiders of the genus Scytodes Latreille from northeastern Brazil (Araneae, Scytodidae). 6 pp. Spixiana 24(2): 123-128.

 Riba J. M.a, Blas M., 1994: Estudios sobre la proporción de sexos de Trypodendron lineatum (Olivier, 1795) (Coleoptera: Scolytidae) en el Valle de Arán (Pirineos Orientales). 13 pp. Elytron 8: 203-215.

 Ribaut H., 1914: Voyage de Ch. Alluaud et R. Jeannel en Afrique Orientale (1911-1912). Résultats scientifiques. Myriapodes. II. Symphyla. 2 plates, 10 pp. 

 Ribbands C. R., 1950: Changes in the behaviour of honey-bees following their recovery from Anaesthesia. 9 pp. 

 Ribbands C. R., 1951: The flight range of the honey-bee. 7 pp. 

 Ribeiro M. G., Teles M. E. O., Maruch S. M. G., 1995: Morphological aspects of the ovary of Columba livia (Gmelin) (Columbidae, Columbiformes). 7 pp. Revta bras. Zool. 12(1): 151-157.

 Ribeiro M. G., Teles M. E. O., Maruch S. M. G., 1997: Histologia e histoquímica do magno, um dos segmentos do oviduto de Numida meleagris (Linné) (Numididae, Galliformes). 8 pp. Revta bras. Zool. 14(1): 213-220.

 Ribera I., 1994: Sex ratios and intersexual size and shape differences in selected Hydradephaga species from the Pyrenees (Coleoptera: Noteridae, Hygrobiidae, Dytiscidae). 14 pp. Elytron 8: 79-92.

 Ribera I., Foster G. N., 1992: Uso de Coleópteros acuáticos como indicadores biológicos (Coleoptera). 15 pp. Elytron 6: 61-75.

 Ribera I., Millán A., 1998: Limnebius aguilerai sp. nov. from south Morocco (Coleoptera: Hydraenidae). 2 pp. Entomological Problems 29(2): 109-110.

 Ribera, Arnedo, 1994: Description of Dysdera gollumi (Araneae, Haplogynae), a new troglobitic species from Tenerife, Canary Islands, with some comments on Canarian Dysdera. 5 pp. 

 Ribes J., 1976: Dos miridos nuevos de la provincia de Alicante (Insecta, Heteroptera). 12 pp. 

 Ricchiardi E., Perissinotto R., Clennell L., 1999: Description of three new species and the Brachypterous females of the genus Eriopeltastes Burmeister Schaum, 1840 (Coleoptera: Cetoniidae: Trichiinae). 15 pp. Elytron 13: 133-147.

 Rice D. W., Scheffer V. B., 1968: A list of the marine mammals of the World. 16 pp. 

 Richards O. W., 1926: Notes on the British species of Lucilia (Diptera). 6 pp. [M40] 

 Richards O. W., 1941: Sphaeroceridae (Diptera) collected by the British Graham Land Expedition, 1934-37. 4 pp. [M42] 

 Richards O. W., 1947: Asilid flies and their prey in British Guiana. 1 pp. 

 Richards O. W., 1947: On a new species of Mesodryinus (Hym., Dryinidae) bred by Dr. E. McC. Callan in Trinidad. 4 pp. [M43] 

 Richards O. W., 1956: A new species of Leptocera Olivier from Hawaii (Diptera: Sphaeroceridae). 3 pp. [M42] 

 Richards O. W., 1956: The nests of South American social wasps. 2 pp. [M43] 

 Richards O. W., 1960: Notes on the names of some Diptera Sphaeroceridae. 4 pp. [M42] 

 Richards O. W., 1962: The nest of Ancistrocerus Waldenii flavidulus Bequaert in California (Hymenoptera: Vespidae). 2 pp. [M43] 

 Richards O. W., 1962: Two new East African species of Alombus Beck and an apterous Sepsid (Chloropidae and Sepsidae). Mission zoologique de l’I.R.S.A.C. en Afrique orientale. (P. Basilewsky et N. Leleup, 1957) LXXI. Diptera. 5 pp. 

 Richards O. W., 1965: A contribution to the study of the genus Sphaerocera Latreille in Central and South America (Diptera: Sphaeroceridae). 19 pp. [M58] 

 Richards O. W., 1965: CI. Diptera. Flightless Sphaeroceridae and Chloropidae. Mission zoologique de l’I.R.S.A.C. en Afrique orientale (P. Basilewsky et N. Leleup, 1957). 50 pp. 

 Richards O. W., 1967: A catalogue of the Diptera of the America South of the United States. 72. Family Sphaeroceridae (Borboridae). 28 pp. [M58] 

 Richards O. W., 1967: Some British species of Leiophron Nees (Hymenoptera: Braconidae, Euphorinae), with the description of two new species. 16 pp. The Transactions of the Royal Entomological Society of London 119(5)

 Richards O. W., 1968: New records and new species of Australian Masaridae (Hymenoptera: Vespoidea). 4 pp. 

 Richards O. W., 1968: New south African species of the genus Scutelliseta Richards (Diptera: Sphaeroceridae). 27 pp. 

 Richards O. W., 1968: Some Sphaeroceridae (Diptera), partly short-winged, collected in South Africa my Monsieur N. Leleup. 16 pp. [M58] 

 Richards O. W., 1969: Cyrtogonatopus Kiefffer (Hymenoptera: Dryinidae), with the description of a new species from Cuba. 3 pp. 

 Richards O. W., 1969: Records of Masarid wasps with descriptions of two new species of Quartinia Ed. André (Hymenoptera). 5 pp. [M43] 

 Richards O. W., 1969: Species of Trypoxylon Latreille (Hymenoptera: Sphecidae) from Cuba. 4 pp. [M43] 

 Richards O. W., 1970: Three new species of Polybia Lepeletier (Hymenoptera, Vespidae, Polistinae). 5 pp. [M43] 

 Richards O. W., 1971: A new British species of Dryinidae (Hymenoptera). 1 pp. [M43] 

 Richards O. W., 1971: The habits of Editha magnifica (Perty) (Hym. Sphecidae, Bembicini). 2 pp. [M43] 

 Richards O. W., 1971: Two new species of the genus Microstigmus Ducke (Hymenoptera: Sphecoidea). 3 pp. 

 Richards O. W., 1973: Rhopalidia Lepeletier, 1836 (Hymenopteraaaaa: Vespidae): proposed suppression undr the plenary powers. Z. N. (S.) 2017. 2 pp. [M43] 

 Richards O. W., 1974: The cretan hornet. 2 pp. 

 Richards O. W., 1975: A new British species of Bethylidae (Hym.). 2 pp. [M43] 

 Richards O. W., 1981: A new species of Quartinioides Richards (Hymenoptera, Masaridae). 2 pp. [M43] 

 Richards O. W., Waloff N., 1959: Macquartia brevicornis Macq. (=occlusa Rond.), a new British tachinid fly. 1 pp. [M42] 

 Richards W. R., 1963: The Myzaphidines of Canada (Homoptera: Aphididae). 25 pp. [M27] 

 Richards W. R., 1964: The scale insects of the Canadian Arctic (Homoptera: Coccoidea). 6 pp. 

 Richards W. R., 1966: A review of Monelliopsis Richards, with descriptions of two new species (Homoptera: Aphididae). 10 pp. [M63] 

 Richards W. R., 1966: A review of Plocamaphis Oestlund with descriptions of three new specie (Homoptera: Aphididae). 17 pp. [M27] 

 Richards W. R., 1967: A revision of Tamalia, with descriptions of two new species from Mexico (Homoptera: Aphididae). 10 pp. 

 Richards W. R., 1967: The Pterocomma of Canada and Greenland with notes on the phyletic position of the Pterocommatini (Homoptera: Aphididae). 26 pp. 

 Richards W. R., 1968: A new species of Iziphya from Ontario and Quebec, with a review of the neartic species (Homoptera: Aphididae). 20 pp. 

 Richards W. R., 1968: A revision of the nearctic genus Neosymydobius (Homoptera: Aphididae). 16 pp.