GRYLLUS, in zoology, the name of the cricket and locust kind, which, together with the grasshoppers, make only one genus of insects, belonging to the order of hemiptera: the characters of which are these: the antennæ are setaceous and filiform; the exterior wings are membranaceous, narrow, and have much of the appearance of the wings of some of the fly kind; the thorax is compressed and angulated; and the legs are formed for leaping. There are no less than 64 species. See Plate LXXXVI. fig. 3. 4. 5.