Guillaume Antoine, a learned French entomologist, was born at Arcs, near Draguignan, in 1756, and took the degree of Doctor of Medicine at Montpellier. His whole life was eagerly devoted to the advancement of natural science. While still a young man, he was drawing up an illustrated account of the Coleoptera for a projected entomological history by Gigot d'Orcy; and he was also engaged in writing a natural history of insects for the Encyclopedie Methodique. After the convulsions of the French revolution had interrupted both these undertak- Olmuts, his increasing reputation recommended him to the notice of Roland, minister of the interior, as a fit person to be sent along with Bruguières on a mission to Persia, for the purpose not only of establishing commercial relations with that country, but also of making contributions to natural science. On his return at the end of more than six years, he set himself to write an account of his voyage, and to finish the two works he had left incomplete. His election into the Institute in 1800 stimulated his industry. He published in 1802-7 his *Voyage dans l'Empire Ottoman, l'Egypte, et la Perse*, in 3 vols. 4to; he finished in 1808 his *Histoire Naturelle des Coleopteres*, in 6 vols. 4to; and he was engaged in his *Dictionnaire de l'Histoire Naturelle des Insectes de l'Encyclopedie Methodique*, when the disease manifested itself which caused his death at Lyons in 1814. This last treatise, which had been begun to be printed in 1789, was completed in 1819, in 9 vols. 4to.

Olivier also contributed several articles on his favourite studies to the Memoirs of the Institute and of the Society of Agriculture, and to the *Nouveau Dictionnaire d'Histoire Naturelle applique aux Arts de Deterville*. (For an account of his special services to the cause of natural science, see Entomology.)