In 1845 Signoret gained his doctorate in pharmacology at the University of Paris.
Signoret worked on Hemiptera, and is considered to be one of the first great students of Coccoidea (mealybugs and scale insects).
He established methods for the preparation of slides for the examination of mealybug morphology.
[1] He wrote over 80 papers, including a Revision du groupe des Cydnides (1881–1884) and he was a Member of the Entomological Society of France, as well as an honour Fellow of the Entomological Society of London.
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