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Updated: June 25, 2025
He wrote an account of the first occasion on which he was present, giving an accurate description of the dinner itself and enclosing a diagram of the manner in which the guests were seated, but without any commentary on the proceedings of the day. It was, after all, one of the nerve-centres of the great world, and an agreeable change from the domestic monotony of the Wayside.
Now comes the turn of the muscular layer which lines the skin; now, that of the essential organs; now, that of the nerve-centres and the trachean network, whereupon the last gleam of light is extinguished and the Cetonia reduced to a mere bag, empty but intact, save for the entrance-hole made in the middle of the belly.
I destroy the nerve-centres and inevitably kill my larva, which is putrid by the following day; the Scolia attacks the reserves of fat, the blood, the muscles and does not kill its victim, which will provide it with wholesome food until the end.
Notochord and backbone may be the most striking and apparent characteristic of vertebrates, but their predominant characteristic is brain. On this system they lavished material, giving it from three to four times as much as any lower or earlier group had done. They very early set apart the cerebral lobes to be the commander-in-chief and centre of control for all other nerve-centres.
"Capraja's great friend is a musician from Cremona, lodging in the Capello palace, who has a theory that sounds meet with an element in man, analogous to that which produces ideas. According to him, man has within him keys acted on by sound, and corresponding to his nerve-centres, where ideas and sensations take their rise.
Besides, it is made anywhere, at the first spot that offers. The expert slayers employ methods of the highest precision: they give a stab in the neck, or under the throat; they wound the cervical nerve-centres, the seat of energy. The paralyzers, those accomplished anatomists, poison the motor nerve-centres, of which they know the number and position.
Their limbs have been modified into the jaws or other mouth-appendages, and their separate nerve-centres have combined to form the large ring of nerve-matter round the gullet which represents the brain of the insect. How, then, do we account for the wings of the insect? Here we can offer nothing more than speculation, but the speculation is not without interest.
These four conditions of success, with chance so near to zero in each case, must all be realized together, or the grub will never be reared. The Scolia may have captured a larva with close-packed nerve-centres, a Cetonia-grub, for instance; but this will go for nothing unless she direct her sting towards the only vulnerable point.
The egg, which will be laid immediately afterwards, demands the complete inertia of the prey from the outset. Hence all the nerve-centres that govern locomotion must be numbed instantaneously by the virus. I can now understand why the poison of the predatory Wasps is comparatively painless in its effects.
The exploits of a host of Wasps whose flesh-eating grubs are provided with meat that is motionless though not dead have taught us the skilful art of the paralysing insect, which numbs the locomotory nerve-centres with its venom. We have now a humble little animal that first produces complete anaesthesia in its patient.
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