Stellio (Daud.), a genus of iguanian lizards, characterized by a triangular, flattened head, covered with numerous small spinous plates; body depressed, the scales having intermixed some larger and rougher plates; a longitudinal fold on each side between the legs; no femoral pores, and no dorsal or caudal crest; anal pores distinct; tail with large keeled and spiny scales arranged in whorls; incisors four above, canines two above and none below, and cheek teeth triangular; no teeth on palate; tongue thick and fleshy. The common stellio (S. vulgaris, Daud.), the lacerta stellio of Linna3us, the hardun of the Arabs, is about a foot long, of which the tail is not quite one half; the color is olive, shaded and spotted with black above and olive yellow below. It is common in the Levant, and especially in Egypt, where its excrements were formerly collected and used in making cosmetics; it is very active, feeding on insects, and living in ruins, clefts of rocks, and holes in the ground. The stellio of the ancients was a species of gecko, and probably the ptyodactylus Hassel-quistii (Dum. and Bibr.). (See Gecko).