nsceloporusAn extensive genus of lizards of the family Iguanidæ: so called from the femoral pores. The best-known is the common brown fence-lizard of the United States, S. undulatus. Many others inhabit different parts of the West. They are of small size (a few inches long) and of moderately stout form, with a long slender fragile tail; the upper parts are undulated and mottled with black, brown, and gray, very variable in shade and pattern, and there is a patch of vivid blue on each side of the belly. They are quite harmless, are very active, and feed upon insects.