"Water Beetles are beetles which live on or in the water. The Dytiscus, common in stagnant water, is olive-green above, and oval in shape. The respiratory organs of the perfect insect are not adapted to obaining air from the water; it comes occasionally to the surface of the water for air, where it lies on its back, the openings of its air tubes in the last segment of the abdomen, being exposed."—(Charles Leonard-Stuart, 1911)

Water Beetle

"Water Beetles are beetles which live on or in the water. The Dytiscus, common in stagnant water, is…