It is observeable, that the whole Process from the Egg, to the _Fly_, of many Species, is perform’d in about sixty Days. But the _Goat Moth_ is an Exception to this Rule, being reported to be three Years proceeding from the Egg to the _Fly_ State. Of the Eggs. The Eggs are of various Forms; some are round, some are oval, and many of the _Moth-Kind_ flat, and perforated through the Middle; so that the _Embrios_ or _Caterpillars_ lie curl’d up before they are hatch’d, as they frequently do afterwards when come to Maturity. They are found of all manner of Colours, and many of them are extremely beautiful if view’d with a Microscope; some being curiously rib’d and adorn’d with _Protuberances_, _&c._ like the nicest carved Work; others marbled and spotted with an amazing Variety of delightful colouring. _Of_ CATERPILLARS. Caterpillars are usually divided into the Naked and Cloathed Kinds. Among the Cloath’d some have only small Tufts of Hair or Down, others are cover’d all over with it. The _Caterpillars_ of all known _Butterflies_ have six Hooks or Claws before, eight Feet in the Middle of their Body, and two Holders behind. Those that produce _Moths_ have all six Hooks or Claws before, and Holders behind. Some have eight Feet in the Middle, some four, and some only two next their Holders. Some Species of _Caterpillars_ always feed inclos’d or spun up in the Leaves they feed upon, others take their Food openly and in Sight. Some are sociable and herd together whilst young, but when they change their third Skin they grow unsociable and feed separately. Others are born unsociable, and feed separately from their Infancy. Some Species spin a large Web that will contain an hundred _Caterpillars_, or more, from which they never go far till they have eat up all the Leaves that are near thereto: Then they spin a new Web, and so (shifting their Quarters) in a short Time, instead of the green Leaves that they have devoured, leave the Tree, or Bush, covered only with their white Webs. Some Sorts, when disturbed, let themselves down by a Thread like a Spider, by which Means they avoid being devoured by other Insects that have not the Means of following them, _&c._ Of the Food of CATERPILLARS, and their Manner of Feeding. Their Food is almost general, but some Kinds will eat nothing except their own particular Trees, or Plants. Some Species feed upon Herbage, others live and feed upon the solid Parts of Trees, and Barks. Some dwell in the Earth, or other private Recesses in the Day-time, and at Night come forth, and feed on Grass, Flowers, _&c._ Others again feed on the different Kinds of Mosses, Heath, Broom, the Leaves of Trees, Shrubs, _&c._ Some feed upon the Waters naked and exposed, and others make themselves Cases of Sticks, Rushes, _&c._ in the Waters, where they get their Food. Of the Forms of CATERPILLARS.