Richards O. W., 1963: Sphaerocerid flies from South and Central America in the collection of the California Academy of Sciences (Diptera). 16 pp. 

 Richards O. W., 1964: New species of Leptocera Olivier. In the Burrows of the pocket gopher, Geomys bursarius illinoensis Komarek and Spencer, found in illionois (Diptera: Sphaeroceridae). 9 pp. 

 Richards O. W., 1964: The entomological fauna of Southern England with special reference to the country round London. 48 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., 1966: New records of Pseudomasaris Ashmead (Hymenoptera: Vespoidea, Masaridae), with notes o P. phaceliae Rohwer and P. cazieri R. M. Bohart. 9 pp. 

 Richards O. W., 1966: New Sphaeroceridae (Diptera) from the Kivu district, with a revision of the genus Aluligera Richards. 54 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., 1968: Sphaerocerid flies associating with doryline ants, collected by Dr. D. H. Kistner. 16 pp. The Transactions of the Royal Entomological Society of London 120(7): 183-198.

 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., 1972: The species of the South American wasps of the genus Microstigmus Ducke (Hymenoptera: Sphecoidea, Pemphredoninae). 26 pp. [51929] The Transactions of the Royal Entomological Society of London 124(2): 123-148.

 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., 1984: Hymenoptera: fam. Masaridae (the Arabian species). 10 pp. Fauna of Saudi Arabia 6: 413-422.

 Richards O. W., Scott H., 1954: Two new wingless species of Diptera, Sphaeroceridae (Bobroridae), from Ethiopia. 5 pp. 

 Richards O. W., Scott H., 1954: Two new wingless species of Diptera, Sphaeroceridae (Borboridae), from Ethiopia. 5 pp. 

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

 Richards W. R, 1968: Neuquenaphis papillata, a new Nothofagus-infesting aphid from Chile, with a review of related species from South America (Homoptera: Aphididae). 9 pp. 

 Richards W. R., 1958: Identities of Species of Lecanium Burmeister in Canada (Homoptera: Coccoidea) 1. 9 pp. 

 Richards W. R., 1960: A new species of Matsucoccus cockerell (Homoptera: Coccoidea). 3 pp. 

 Richards W. R., 1960: A new species of Monellia Oestlund, with a synopsis of the aphids attacking hickory and walnut in Canada. 10 pp. 

 Richards W. R., 1960: A synopsis of the genus Rhopalosiphum in Canada (Homoptera: Aphididae). 47 pp. 

 Richards W. R., 1962: A new species of Nasonovia Mordwilko (Homoptera: Aphididae). 4 pp. 

 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 new species of Myzocallis Passerini, with a key to the North American species (Homoptera: Aphididae). 5 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. 

 Richards W. R., 1968: A revision of the world fauna of Tuberculatus, with descriptions of two new species from China (Homoptera: Aphididae). 36 pp. 

 Richards W. R., 1968: Glyphina longiseta, a new alder-infesting aphid from Nova Scotia (Homoptera: Aphididae). 4 pp. 

 Richards W. R., 1968: New combination and recescription of Monellia californica with a key to the species of Monelliopsis (Homoptera: Aphididae). 4 pp. 

 Richards W. R., 1969: A review of the Holarctic genus Roepkea with descriptions of four new Nearctic species (Homoptera: Aphididae). 42 pp. 

 Richards W. R., 1970: Izyphya grandipes, a new aphid from Ontario (Homoptera: Aphididae). 3 pp. 

 Richards W. R., 1971: Tuberculatus spiculatus, a new aphid from Mexico (Homoptera: Aphididae). 3 pp.