rted. The influence of environment, so
well-inspired in endowing the grub with ambulatory pads, becomes a
mockery when it leaves it these ridiculous stumps. Can the structure,
perchance, be obeying other rules than those of environment?

Though the useless legs, the germs of the future limbs, persist, there
is no sign in the grub of the eyes wherewith the Cerambyx will be
richly gifted. The larva has not the least trace of organs of vision.
What would it do with sight in the murky thickness of a tree-trunk?
Hearing is likewise absent. In the never-troubled silence of the oak's
inmost heart, the sense of hearing would be a non-sense. Where sounds
are lacking, of what use is the faculty of discerning them? Should
there be any doubts, I will reply to them with the following
experiment. Split lengthwise, the grub's abode leaves a half-tunnel
wherein I can watch the occupant's doings. When left alone, it now
gnaws the front of its gallery, now rests, fixed by its ambulacra to
the two sides of the channel. I avail myself of these moments of quiet
to inquire into its power of perceiving sounds. The banging of hard
bodies, the ring of metallic objects, the grating of a file upon a saw
are tried in vain. The animal remains impassive. Not a wince, not a
movement of the skin; no sign of awakened attention. I succeed no
better when I scratch the wood close by with a hard point, to imitate
the sound of some neighbouring larva gnawing the intervening thickness.
The indifference to my noisy tricks could be no greater in a lifeless
object. The animal is deaf.

Can it smell? Everything tells us no. Scent is of assistance in the
search for food. But the Capricorn grub need not go in quest of
eatables: it feeds on its home, it lives on the wood that gives it
shelter. Let us make an attempt or two, however. I scoop in a log of
fresh cypress-wood a groove of the same diameter as that of the natural
galleries and I place the worm inside it. Cypress-wood is strongly
scented; it possesses in a high degree that resinous aroma which
characterizes most of the pine family. Well, when laid in the
odoriferous channel, the larva goes to the end, as far as it can go,
and makes no further movement. Does not this placid quiescence point to
the absence of a sense of smell? The resinous flavour, so strange to
the grub which has always lived in oak, ought to vex it, to trouble it;
and the disagreeable impression ought to be revealed by a certain
commotio