The poison of the sting is similar to snake-poison (Calmette), and rapidly paralyses animals which are not immune to it.
Calmette, La Diplomatie carolingienne du traite de Verdun a la mort de Charles le Chauve (Paris, 1901), and F.
Calmette, editor of the Figaro (1914), when he secured her acquittal.
Calmette and Fraser found that when small doses of snake venom, insufficient to cause death, are injected into an animal, temporary disturbance is produced; but after a few days the animal recovers, and a larger dose is then required to produce any symptoms. By gradually increasing the dose the animal becomes more and more resistant, until at last a dose fifty times as great as that which would at first have produced immediate death can be injected without doing the animal any harm.