Joseph Vachal

Arthur Louis Marie Joseph Vachal (25 September 1838 – 31 January 1911) was a French politician and entomologist who studied the Hymenoptera.

He then joined his father's notary firm in Argentat where he became “notaire honoraire” in 1884.

He served as deputy for the Tulle region and in 1881 he became a member of the Gauche républicaine.

He joined the French Entomological society in 1882 and began to collect hoverflies and hymenoptera.

From 1895, when Eugène Louis Bouvier (1856–1944) became the head of the entomology department in the Paris Museum, he and other amateurs were enabled to visit and work on the collections.