THRIPS, a genus of insects, belonging to the order of hemiptera. The rostrum is obscure, or so small as to be scarcely perceptible. The antennæ are filiform, and as long as the thorax. The body is slender, and of equal thickness in its whole length. The abdomen is reflexible, or bent upwards. The four wings are extended, incumbent upon the back of the insect, narrow in proportion to their length, and cross one another at some distance from their base. The tarsi of the feet are composed of only two articulations. There are five species. The largest is the juniperina, of a glossy black colour with yellowish antennæ; the wings and elytra are whitish, narrow, and furnished at the point with a few small hairs. The insects live under the bark of old trees, in flowers, and under the juniper-tree. In the same places are to be found their larvae, which only differ from them by the want of wings and elytra; but it is difficult to observe these differences in such diminutive creatures, which look rather like moving atoms than any thing else.