Georges Demoulin (11 March 1919 – 27 July 1994) was a Belgian entomologist. He specialised in the Ephemeroptera.
A short necrology has been published by Jacques Rigout.
He was born at Amay, He is attracted by the forms and the colors of insects, he abandons his studies of pharmacy to be engaged at the age of 28 as naturalist trainee to the Royal museum of natural History of Belgium.
After a stay of one year in Africa in the National park of Garamba, he returns to the museum where he is in charge of the collections of insects with aquatic habits.
His publications are numerous, among these we can note:
1952. Contribution à l'étude des Ephoronidae Euthyplociinae, 1952, Bulletin de l'Institut royal des Sciences naturelles de Belgique, 28 (45), pp. 1–221966. Contribution à l'étude des Ephéméroptères du Surinam, 1952, Bulletin de l'Institut royal des Sciences naturelles de Belgique, 42 (37), pp. 1–221970. Ephemeroptera des faunes éthiopiennes et malgache, South African Animal Life, 14, pp. 24–1701975. Remarques sur la nervation alaire des Oligoneuridae (Ephemeroptera), Bulletin de l'Institut royal des Sciences naturelles de Belgique, 51, pp. 1–4Demoulinia Gilles, 1990Abacetus demoulini Straeno, 1963Adenophlebiodes demoulini Kimmis, 1960Afrocurydemus demoulini Selman, 1972Brachinus demoulini Basilewsky, 1962Caenis demoulini van Bruggen, 1954Corindia demoulini Grichanov, 2000Dryops demoulini Delève, 1963Glossidion demoulini Lugo-Ortiz & McCafferty, 1998Gomphoides demoulini St. Quentin, 1967Hikanopilon demoulini Matile, 1990Hyalophlebia demoulini Kimmins, 1960Jana demoulini Berger, 1980Leiodytes demoulini Guignot, 1955Limnichus demoulini Delève, 1980Melanophthalma demoulini Dajoz, 1970Odontolabis gazella demoulini Maes, 1981Pachnoda demoulini Rigout, 1978Thraulus demoulini Peters & Tsyu, 1973Triaenodes demoulini Jacquemart, 1967