Dr. Pierre Jules Tosquinet (16 February 1824, in Bastogne – 28 October 1902, in Saint-Gilles) was a physician and entomologist.
He served as Military Inspector General for Health of the Belgian Army and the President of the Entomological Society of Belgium.
After graduation, he was commissioned as a doctor in the army's medical service, where he rose to become director of the Brussels Military Hospital.
Together with Jean-Charles Jacobs, he worked on a catalog of the Belgian parasitoid wasps, two parts of which appeared before his death: the group of the Tryphonides (1890) and the Pimplides (1897).
Some genera of parasitic wasps that Tosquinet has described are Mansa, Satrius, Hieroceryx, Occia, and Encardia.