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Updated: June 23, 2025
Zealous workers, they seek and find under ground the fat grubs on which their family will feed. They follow the chase by virtue of the same quality as the most renowned hunters, Cerceris, Sphex or Ammophila; only, instead of removing the game to a special lair, they leave it where it is, down in the burrow. Homeless poachers, they let their venison be consumed on the spot where it is caught.
Nowhere do we see repeated the care expended upon paralysing the thorax, still less the insistent attention to the first segment. On returning to her Looper after the entr'acte devoted to the joys of success, the Ammophila stabs so swiftly that, on one occasion, I saw her obliged to begin all over again. Lightly stung along its whole length, the victim still struggles.
Thus, for instance, Ammophila hirsuta fixes hers, by one end, cross-wise, on the Grey Worm, on the side of the first prolegged segment. The eggs hang over the caterpillar's back, away from the legs, whose proximity might be dangerous.
Nevertheless, she is constantly feeling the ground with her antennae. What can be the function of those organs? I do not know, although I assert that they are not olfactory organs. The Ammophila, in search of her Grey Worm, had already led me to make the same assertion; I now obtain an experimental proof which seems to me decisive.
How does the Ammophila, hovering over the turf and investigating it far and wide, in its search for a grey grub, contrive to discern the precise point in the depth of the subsoil where the larva is slumbering in immobility?
What would happen if the ladder were prolonged, if the offspring of the Ammophila fed on Spiders were given the same food generation after generation?
The Ammophila, we imagine, must learn, one by one, like the entomologist, the positions of the nerve-centres of the caterpillar must acquire at least the practical knowledge of these positions by trying the effects of its sting.
The first, often renewed under glass during the greater part of August, has always refused my offers; the second, her contemporary, has, on the contrary, promptly accepted them. I present Jules' Ammophila with a slender, brownish Looper which I caught on the jasmine. The attack is not slow in coming.
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 Hairy Ammophila, operating on her caterpillar, likewise recoils, but progressively, from one segment to the next. Her deliberate surgery might receive a quasi-explanation if we ascribe it to a certain uniformity. With the Tachytes and the Mantis this paltry argument escapes us.
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