Ontholestes is a genus of beetles belonging to the family Staphylinidae, commonly known as rove beetles. These insects are typically small to medium-sized, ranging from 5 to 15 millimeters in length. Ontholestes beetles are characterized by their elongated bodies, short elytra (wing covers), and long, slender antennae. They are often found in decaying organic matter, such as dung or carrion, where they play an important role in decomposition processes.