We shall now give some curiosities respecting Worms ; and first, of The Caterpillar. - The larvae of butterflies are universally known by the name of caterpillars, and are extremely carious in their forms and colours, some being smooth, others beset with either simple or ramified spines, and some are observed to protrude from their front, when disturbed, a pair of short tentacula, or feelers, somewhat analogous to those of a snail. A caterpillar, when grown to its full size, retires to some convenient spot, and, securing itself properly by a small quantity of silken filaments, either suspends itself by the tail, hanging with its head downwards, or else in an upright position, with the body fastened round the middle by a number of filaments. It then casts off the caterpillar-skin, and commences chrysalis, in which state it continues till the butterfly is ready for birth, which, liberating itself from the skin of the chrysalis, remains till its wings, which are at first short, weak, and covered with moisture, are fully extended; this happens in about a quarter of an hour, when the animal suddenly quits the state of inactivity to which it had been so long confined, and becomes at pleasure an inhabitant of the air.

Account Of The Caterpillar-Eaters

Caterpillar-eaters are a species of worms bred in the body of the caterpillar, and which eat its flesh. These are produced by a certain kind of fly, that lodges her eggs in the body of this insect; and they, after their proper changes, become flies like their parents. Mr. Reaumur has given us, in his History of Insects, some very curious particulars respecting these little worms. Each of them spins itself a very beautiful case, of a cylindric figure, of a very strong sort of silk, in which this animal spends its state of chrysalis ; and they have a mark by which they may be known from all other animal productions of this kind, which is, that they have always a broad stripe or band surrounding their middle, which is black when the rest of the case is white, and white when that is black. Mr. Reaumur has had the patience to find out the reason of this singularity. The whole shell is spun of a silk produced out of the creature's body; this at first runs all white, and towards the end of the spinning turns black. The outside of the case must necessarily be formed first, as the creature works from within ; consequently this is truly white all over, but it is transparent, and shows the last spun, or black silk, through it. It might be supposed that the whole inside of the shell should be black; but this is not the case: the whole is fashioned before this black silk comes ; and this is employed by the creature, not to line the whole, but to fortify certain parts only; and therefore is all applied either to the middle, - or to the two ends, omitting the middle, - or a blackness at both ends, leaving the white in the middle to appear. It is not uncommon to find a sort of small cases, in garden walks, which appear to move of themselves; when these are opened, they are found to contain a small living worm. This is one of the species of these caterpillar-eaters; which, as soon as it comes out of the body of that animal, spins itself a case for its transformation, and lives in it without food till that change comes on, when it becomes a fly, like that to which it owed its birth.