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It had not any hair or nails, for it had come before its time, but when she saw this human larva move its limbs and open its mouth, and when she touched its wrinkled little face, her heart overflowed with happiness, and she knew that she would never feel weary of life again, for her love for the atom she held in her arms would be so absorbing that it would make her indifferent to everything else.
The most nearly complete instances that I have seen furnishes me with the following data: the pseudochrysalis is very closely enveloped in the skin of the secondary larva, a skin consisting of fine transparent pellicle, without any rent whatever. This is the pouch of the Sitaris, save that it lies in immediate contact with the body enclosed.
It flies but little during the day, and is usually found quietly sitting amongst the leaves of plants, and seems to be one of the most pacific and harmless of insects. How very different with the larva the very reverse See!" Dona Isidora pointed to the ant-lion that was just then beginning to bestir itself, and both sat silent regarding it attentively.
In certain contingencies, such as the loss of the queen with no eggs in the royal cells, the workers take the larva of an ordinary bee, enlarge the cell by taking in the two adjoining ones, and nurse it and stuff it and coddle it, till at the end of sixteen days it comes out a queen.
For this petal-like tube, so commonly to be seen upon the little rush of our paths, is, in truth, a tiny silken case enclosing the body of a small larva a diminutive psychid, or sack-bearer, which I have not chanced to see described. Only the head and six prolegs of the occupant ever emerge from its case.
Next, to provide the grub with a ready-made hole, knowing that it will refuse to make one for itself, I contrive a slight incision in the skin, at the point where the Scolia lays her egg. I now place the grub upon the larva, with its head touching the bleeding wound, and lay the whole on a bed of mould in a transparent beaker protected by a pane of glass.
A succeeding stage of this mite, which may be called the pupal, is considerably smaller than the larva and looks somewhat like the adult, the body having become shorter and broader.
Again, the processes of development presented by some of these creatures do not by any means point to an origin through the linear coalescence of primitively distinct animals by means of imperfect segmentation. Again, Nicholas Wagner found in certain other Diptera, the Hessian flies, that the larva gives rise to secondary larvæ within it, which develop and burst the body of the primary larva.
The find is a magnificent one indeed and of a nature to fill me with delight, awakening all my old recollections of the Bois des Issards. Any number of females of the Two-banded Scolia, disturbed at their work, are emerging here and there from the depth of the soil. The cocoons also are plentiful, each lying next to the skin of the victim on which the larva has fed.
In the Meloes, it is half-enclosed in the split integuments of the pseudochrysalis, even as these, in their turn, are half-enclosed in the skin of the secondary larva. From the tertiary larva onwards the metamorphoses follow their habitual course, that is to say, this larva becomes a nymph; and this nymph the perfect insect.
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