1. AQUATIC BEETLES 2. FLIES WITH AQUATIC LARVÆ 3. AQUATIC HYMENOPTERA 4. AQUATIC CATERPILLARS 5. CADDIS-WORMS (TRICHOPTERA) 6.SIALADÆ 7. PERLIDÆ 8. MAY-FLIES (EPHEMERIDÆ) 9. DRAGON-FLIES (ODONATA) 10. POND-SKATERS, WATER-SCORPIONS AND WATER-BOATMEN (RHYNCHOTA) 11. THE WATER SPRING-TAIL (PODURA) 12. INSECTS OF THE SEA-SHORE 13. THE CONTRIVANCES OF AQUATIC INSECTS