Thrips, a genus of insects comprising 11 species, that are variously named, according to the trees which they infest. These vermin are extremely minute; having a small slender body, and a rostrum, or beak, which is scarcely perceptible to the naked eye: they are very pernicious to fruit-trees, attacking both the leaves and fruit; but may be extirpated by resorting to the method already pointed out, vol. ii. pp. 21, and 22.