Eugène Louis Simon (French pronunciation: [øʒɛn lwi simɔ̃]; 30 April 1848 – 17 November 1924) was a French naturalist who worked particularly on insects and spiders, but also on birds and plants. He is by far the most prolific spider taxonomist in history, describing over 4,000 species.
Jean Pierre Mégnin (16 January 1828 – 31 December 1905) was a French army veterinarian and entomologist. He is best known for his work with dogs in the field of cynology. He also contributed to the field of forensic entomology. He led experiments which unveiled the eight distinct waves of insect succession on corpses exposed to air. Similarly, he showed two waves of insect succession on corpses that are buried.
Paul Alfred Daniel Marchal (27 September 1862, Paris, – 2 March 1942, Paris) was a French entomologist. He was president of the French Entomological Society (Société entomologique de France) in 1907. He was president of the French Zoological Society (Société zoologique de France) in 1909.
In 1883 Marchal received his undergraduate degree from the Academy of Paris (University of France). In 1889 he received a doctorate in medicine and in 1892 a doctorate in science, from the same institution.
Marchal worked for the French government in Paris as an entomologist for the Ministry of Agriculture. In 1894 he became chief-of-staff of the entomology section, and in 1910 he became Director of the entomology station in Paris. In 1898 he started teaching at the Institut national agronomique (National Institute of Agriculture) and in 1900 he was appointed as a professor of applied zoology and agriculture.
In 1912, based on the American experience with Novius cardinalis and the earlier work of Raymond Poutiers, he made the first release of acclimatized ladybugs in Europe, in Alpes-Maritimes in southeastern France, for the biological control of cochineal scale.Marchal was a member of the French Academy of Sciences from 1912 until his death in 1942.
Joseph Alexandre Laboulbène (25 August 1825 Agen – 7 December 1898, Paris) was a French physician and entomologist.
A friend of the entomologist Jean-Marie Léon Dufour (1780-1865), he studied medicine in the University of Paris and was awarded the title Docteur in 1854. He taught in the medical faculty until 1879.
Laboulbène was interested in harmful insects notably in the Order Diptera. The order of mushrooms Laboulbeniales, is dedicated to him, by Engler in 1898.In 1853, Laboulbenia which is a genus of fungi in the family Laboulbeniaceae, was named in his honour.
Louis-Félix Henneguy (18 March 1850 – 16 January 1928) was a French zoologist and embryologist born in Paris.
In 1875, he received his medical doctorate from the University of Montpellier with a dissertation on the physiological action of poisons, Étude physiologique sur l'action des poisons. In 1883 he obtained his agrégation with Les lichens utiles, a thesis on useful lichens.
During his career he was a professor of comparative embryology at the Collège de France (1900–28), and a member of the Académie de Médecine, the Académie d'Agriculture and the Académie des sciences (1908–28). From 1894 he was director of the journal, Archives d'anatomie microscopique.
He is known for his extensive research of phylloxera, publishing a number of papers on means of destroying its eggs during the winter (1885, 1887–88). Also he performed studies on the natural history of the apple blossom weevil, proposing methods for its eradication (1891). On behalf of the Marine Fisheries Advisory Committee, he did reviews involving the sale and consumption of mussels throughout the year.
With Hungarian neuroanatomist, Mihály Lenhossék (1863–1937), the "Henneguy–Lenhossek theory" is named, which states the claim that mitotic centrioles and ciliary basal kinetosomes are fundamentally the same structure.As a taxonomist he circumscribed the apicomplexan genus Rhytidocystis, and the protozoan genera Thelohania and Fabrea. The genus Henneguya Thélohan, 1892 is named after him, as are the species Apherusa henneguyi Chevreux & Fage, 1925 and Ectinosoma henneguyi Labbé, 1926.In 1903 he was appointed president of the Société entomologique de France.
Eugène Louis Bouvier (9 April 1856 in Saint-Laurent-en-Grandvaux – 14 January 1944 in Paris) was a French entomologist and carcinologist. Bouvier was a professor at the Muséum national d'histoire naturelle.