None exists save to the detriment of others. Everywhere, even in the smallest, we find "an atrocious activity, a cunning brigandage," a savage extermination, which dominates a vast unconscious world of which the final result is the restoration of equilibrium. (10/7.) It is only on these antagonisms, on the enemies of our enemies, that we can found any hope of seeing this or that pest disappear. A small Hymenopteron, almost invisible, the Microgaster glomeratus, is entrusted with the destruction of the cabbage caterpillar; the cochineal wages war to the death upon the green- fly; the Ammophila is the predestined murderer of the harvest Noctuela, whose misdeeds in a beetroot country often amount to a disaster. The Odynerus has for its instinctive mission to arrest the excessive multiplication of a lucerne weevil, no less than twenty-four of whose grubs are necessary to rear the offspring of the brigand, and nearly sixty gadflies are sacrificed to the growth of a single Bembex. Everywhere craft is organized to triumph over force. Around each nest the parasites lie in wait, "atrocious assassins of the child in the cradle, watching at the doors for the favourable occasion to establish their family at the expense of others. The enemy penetrates the most inaccessible fortress; each has its tactics of war, devised with a terrible art. Of the nest and the cocoon of the victim the intruder makes its own nest, its own cocoon, and in the following year, instead of the master of the house, he will emerge from underground as the usurping bandit, the devourer of the inhabitant." While the cicada is absorbed in laying her eggs an insignificant fly labours to destroy them. How express the calm audacity of this pigmy, following closely after the colossus, step by step; several at once almost under the talons of the giant, which could crush them merely by treading on them? But the cicada respects them, or they would long ago have disappeared." (10/8.) Fabre thus agrees with Pasteur, who in the world of the infinitely little shows us the same antagonisms, the same vital competition, the same eternal movement of flux and reflux, the same whirlpool of life, which is extinguished only to reappear: tending always towards an equilibrium which is incessantly destroyed. And it is thanks to this balancing that the integral of life remains everywhere and always almost identical with itself. CHAPTER 11. HARMONIES AND DISCORDS. Such indeed is the economy of nature that secret relations and astonishing concordances exist throughout the whole vast weft of things. There are no loose ends; everything is consequent and ordered. Hidden harmonies meet and mingle.