The caterpillar is represented immediately above, fig. 3 a. This is one of the caterpillars called “Loopers,” on account of their peculiar mode of walking.

They have no legs on the middle portion of their bodies, but only the usual six little legs at the three rings nearest the head, and a few false legs by the tail; so when they want to walk, they attain their object by holding fast with their false or pro-legs as they are called, and stretching themselves forward to their fullest extent. The real legs then take their hold, and the pro-legs are drawn up to them, thus making the creature put up its back like an angry cat.

The grasp of the pro-legs is wonderfully powerful, and in them lies the chief peculiarity of the creature. The surface of the body is of a brownish tint, just resembling that of the little twigs on which it sits; there are rings and lines on its surface that simulate the cracks and irregularities of the bark, and in one or two places it is furnished with sham thorns.

Trusting in its mask, the caterpillar grasps the twig firmly, stretches out its body to its full length, and so remains, rigid and immovable as the twigs themselves. People have been known to frighten themselves very much by taking hold of a caterpillar, thinking it to be a dead branch.

The only precaution taken by the creature is to have a thread ready spun from its mouth to the branch, so that if it should be discovered, it might drop down suddenly, and when the danger was over, climb up its rope and regain its home.

The commonest of the loopers is the well-known caterpillar of the Currant or Magpie Moth, [plate E], fig. 3. This creature is remarkable from the circumstance that its colours are of the same character throughout its entire existence; the caterpillar, chrysalis, and perfect moth showing a similar rich colour and variety of tint, as seen on figs. 3 a and 3 b.

It is a curious fact that almost every stratagem of animals is used by man; whether intuitively, or whether on account of taking a hint, I cannot say.

For example, Parkyns, the Abyssinian traveller, tells an amusing tale of a party of Barea robbers, who when pursued got up a tableau vivant at a moment’s notice. One man personated a charred tree-stump, and the others converted themselves into blackened logs and stones lying about its base.

It seemed so impossible for human beings to remain so still, that a rifle-ball was sent towards the stump, and caused it to take to its heels, followed by the logs and stones.

I have heard of a similar stratagem that was put in force by a robber who was interrupted on his way into the tent by the appearance of its inmate, an officer. He was so completely deceived, that he actually hung his helmet on one of the branches, which branch was in fact the robber’s leg. The joke was almost too good, but the stump stood fast, until the officer leaned his back against it. Officer and stump came to the ground together, and the stump escaped, carrying off the helmet as a trophy. I think that he deserved it.