Lepismatidae is a family of primitive wingless insects belonging to the order Thysanura with about 190 described species. This family contains the two most familiar apterygotes, the silverfish (Lepisma saccharina) and the firebrat (Thermobia domestica). Lepismatids are elongated, flattened insects, the majority of which are scavengers. The abdomen... Found on http://en.wikipedia.org/wiki/Lepismatidae