 Jules Bourgeois was initially associated with his father and brother in Rouen, as the Paris representative of the family weaving business (1881-1889) and later worked at the spinning mills of H. Schwartz in Sainte Marie-aux-Mines from 1893.He used his leisure time to follow his true vocation, that of a naturalist.Bourgeois studied coleoptera then included in the then group Malacodermata, now unranked (Elateroidea (in part), Lymexyloidea, Cleroidea, Tenebrionoidea).