The transformation is complete.

Now the great locust has only to harden its tissues a little longer and to tan the grey of its costume in the ecstasy of the sunshine.

Let us leave it to its happiness, and return to an earlier moment.
The four stumps which emerge from their coverings shortly after the rupture of the corselet along its median line contain, as we have seen, the wings and elytra with their innumerable nervures.

If not perfect, at least the general plan is complete, with all its innumerable details.
To expand these miserable bundles and convert them into an ample set of sails it is enough that the organism, acting like a force-pump, should force into the channels already prepared a stream of humours kept in reserve for this moment and this purpose, the most laborious of the whole process.

As the capillary channels are prepared in advance a slight injection of fluid is sufficient to cause expansion.
But what were these four bundles of tissue while still enclosed in their sheaths?
Are the wing-sheaths and the triangular winglets of the larva the moulds whose folds, wrinkles, and sinuosities form their contents in their own image, and so weave the network of the future wings and wing-covers?
Were they really moulds we might for a moment be satisfied.