pillars are extremely voracious, and in that state cause so much mischief, as to destroy the whole crop.

One of the principal species is the Tent Itrecto lute,, which proceeds from a large green larva adorned with a double row of black specks along each side. The chrysalis, which is of a palish brown, displays the limbs of the future fly, which is yellow, barred with black, and nearly as large as a common wasp.

The larva of the genus Sirc.v,' live in the decayed pa rtsof trees, on the substance of which they, feed. The limbs ofthe perfect insect' are as clearly perceptible in the chrysalis, as in the genus Thntkredo. It is rarely seen in this country; but some species have been caught h

The largest species is the Sirex gigas, which exceeds a hornet" in size, and is' principally observed in4he neighbourhood of pinebearing trees. It is black, with the eyes and lower half of the abdomen bright orange colour: the thorax is hairy, and' the wings of a trans parent, yellowish brown. The sting is' very

onspicuous and consists of three" laminae or parts two at the sides, which serve for sheaths; and one in the middle, rather toothed, which is the real sting, and is forked at the end. The male is smaller than the female, and has

neither