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. 1–22
1966. Contribution à l'étude des Ephéméroptères du Surinam, 1952, Bulletin de l'Institut royal des Sciences naturelles de Belgique, 42 (37), pp. 1–22
1970. Ephemeroptera des faunes éthiopiennes et malgache, South African Animal Life, 14, pp. 24–170
1975. Remarques sur la nervation alaire des Oligoneuridae (Ephemeroptera), Bulletin de l'Institut royal des Sciences naturelles de Belgique, 51, pp. 1–4
Demoulinia Gilles, 1990
Abacetus demoulini Straeno, 1963
Adenophlebiodes demoulini Kimmis, 1960
Afrocurydemus demoulini Selman, 1972
Brachinus demoulini Basilewsky, 1962
Caenis demoulini van Bruggen, 1954
Corindia demoulini Grichanov, 2000
Dryops demoulini Delève, 1963
Glossidion demoulini Lugo-Ortiz & McCafferty, 1998
Gomphoides demoulini St. Quentin, 1967
Hikanopilon demoulini Matile, 1990
Hyalophlebia demoulini Kimmins, 1960
Jana demoulini Berger, 1980
Leiodytes demoulini Guignot, 1955
Limnichus demoulini Delève, 1980
Melanophthalma demoulini Dajoz, 1970
Odontolabis gazella demoulini Maes, 1981
Pachnoda demoulini Rigout, 1978
Thraulus demoulini Peters & Tsyu, 1973
Triaenodes demoulini Jacquemart, 1967
