How reasonable is this conclusion may be gathered at the Museum where, in the “A” room, in a large glass case, stands a complete bush exactly as growing, and although it is labelled “Gorokakak tree from Jupiter”—after the insect feeding upon it—many of the leading metallurgists consider it a magnificent specimen of Jovian metal-work. Strange to say, the leaf, living or dead, undergoes no change, and the hairs will successfully withstand a very high temperature, but are not entirely fireproof, for after sustaining long-continued heat, eventually they blaze and burn quickly, then subside to a glow which remains for a short time and becomes brilliantly white, with evolution of dense smoke, and then they fall to powder, like magnesium-ribbon. The life-history of the gorokakak is extremely interesting. First of all there are the winged male and female, incapable of flying more than a few inches, and both these male and female parents have sucking mouth-organs which attach themselves to the undersides of the leaves. After mating the male dies and the female spreads her wings over her body like a shroud, and these becoming fast there by the interlocking of a hook, or spine, on the inner side of each wing-tip, she flies no more but, her mouth taking the nutriment from the leaf to which she is attached for the short time she has to live, commences laying her eggs on the underside of the leaf in circles of about a quarter of an inch in diameter and about half an inch apart, in order to give them space to develop, the sheltering leaf affording shade and protection from the weather and enemies. Then she dies, and in the course of a few weeks the ova develop into both males and females, but these have no sucking and piercing mouth-organs, and being wingless, progress slowly towards the stem of the plant, eating the leaf as they proceed, leaving but the skeleton with the silken fibres or hairs attached. On reaching the stem, each female, having selected her mate, lays two eggs, neither more nor less, on the tender part of the bark, and these minute grubs, which are always females, pierce their way under the bark where they lie dormant for several months, when they emerge and crawl to the stems and roots and lay parthenogenetic eggs, which form galls. These eggs develop again into young females, which also lay parthenogenetic eggs, forming more galls, and so on for ten parthenogenetic generations. All this causes the roots and stems of the plant to become gnarled and knotted and the leaves all skeleton. The eleventh of these generations crawls to the leaves to devour the skeleton fibres and the long, silken filaments, leaving nothing except the deformed and knotted roots and stem-sticks. After the fibres and hairs have undergone certain processes in the viscera, the insect spins a cocoon which it covers with a hard, heat-resisting substance like mica, leaving open a small hole at one end into which it creeps; then it exudes more