General colour brown, but probably green when alive, becoming brown by the spirits in which it was preserved. AntennÆ about three inches long, and composed of a great number of articulations (not less than fifty) being thickest at their roots, from whence they diminish a little to their extremities. Head oblong, with two short thick spines on the top, near the front. Eyes small, round, black, and distant. Four palpi, each 4-jointed; that next the mouth being the shortest. Mouth appearing not to be furnished with strong teeth or jaws, but seeming rather formed for macerating tender plants. Neck and thorax having a great many short thick spines on them; particularly the latter, which has a ridge on each side, full of spines like the teeth of a saw, extending to the abdomen. "It is evident this species is furnished with wings when arrived to its complete state, by the rudiments observable in this; which, though they are exceeding small, are a sufficient proof it is not wingless." Abdomen composed of seven articulations; the last being divided into three smaller ones, from whence springs from the under part an instrument that extends about half an inch beyond the tail, being shaped like a three-edged sword; each side being hollowed and grooved like that weapon. When first received, the abdomen was considerably broader than it is now, being then nearly the breadth of a man's thumb; but now is contracted one-fourth, and in proportion every other part is less, except the head. The hind legs are longer than the rest; but are not formed, like the locust tribe, for leaping. The under part of the thighs are furnished with short thick spines; those on the hinder ones being the strongest, and most conspicuous. The tips of the femora are furnished with two thick strong spines, which are placed on each side the joint. The tibiÆ are short and thick. The tarsi consist of five articulations besides the claws; the bottom of each having a valve or sucker to it; those placed between the hooks being considerably larger than the others, by which the creature is enabled to climb up any thing perpendicularly that has a smooth surface.