Robiquet likewise analysed a variety of animal tissues. Thus in 1810, he isolated from "Lytta vesicatoria", an insect, a molecule that he calls cantharidin, which he proves is the cause of the severe irritations and blisters provoked by that insect, and is present in a variety of unrelated species that use the molecule as a protection of their eggs from predation (Two families of insects belonging to the order of Coleoptera synthetise that molecule : Meloidae and Oedemeridae. The first family, to the which Lytta vesicatoria belongs in the Lytta genus, is rich of several thousands of species)