CHAPTER IV THE LANGUEDOCIAN SCORPION: THE IMMUNITY OF LARVÆ So little do we possess the Scorpion’s secret that unexpected facts crop up that strangely complicate the problem. The study of life brings us these surprises. Repeated experiments, with mutually consistent results, seem to justify our formulation of a rule when, suddenly, important exceptions arise, compelling us to follow a fresh path, directly opposed to the first, and leading us to doubt which is the last stage on the road to knowledge. After labouring long and patiently, like an ox yoked to the plow, we have to plant a note of interrogation at the end of the field which we thought that we had made ready for sowing, without any hope of a final answer. One question leads to another. To-day the Cetonia-larvæ have forced upon me a similar change of opinion. It was at the end of November, late in the year, when the adult insect was becoming scarce. At this season of dearth, for lack of anything better wherewith to continue my experiments, I thought of resorting to the grubs of the Cetonia, grubs which abound all the year through in a heap of dead leaves in a corner of the enclosure. The naturalist who questions animals is necessarily a torturer: there is no other means of making them speak. A host of questions therefore sends my curiosity rummaging, as a regular thing, in that heap of leaf-mould. Every physiological laboratory has its appointed victims: the Frog, the Guinea-pig, even the Dog. The Cetonia-larva suffices for my rustic work-shop. I add the humble grub to the noble series of victims of whose suffering our knowledge is born. The advanced and already cold season has not slackened the Scorpion’s activity; the fat grub, on its part, in the warm moisture of the decayed leaves, has retained all the suppleness of its back. Both are in perfect condition. I bring them face to face. The attack is not spontaneous. The larva flees obstinately, turned over on its back, skirting the wall of the cage. The Scorpion remains motionless and looks on; he draws to one side and makes way when the circular track brings the creature in his direction. It is not a prey to his liking, still less a dangerous adversary; and killing merely for killing’s sake is not one of his vices. If I did not interfere, the peaceful encounter might continue indefinitely. I worry the two of them, bring them into contact, irritate them with a bit of a straw, to such good purposes that my devices look like an attack on the part of the grub. The poor topsy-turvy creature is certainly not dreaming of fighting; it is a natural coward which, when in danger, curls up and refuses to move. Unaware of my tricks with the straw, the Scorpion ascribes to his innocent neighbour the annoyance of which I alone am the cause. He waves his sting on high and stabs. The blow has struck home, for the wound bleeds.