Charles W. Heckman, retired, is affiliated with the Max-Planck Institute for Limnologie, Plon, Hamburg, Germany.

Hexapods and Water: An Introduction to Aquatic Insects and Collembolans. General Classifications of Water Bodies Inhabited by Hexapods. Life on the Surface Tension. Herbivorous Insects on Aquatic Plants. Hexapods on the Roots and Rhizoids Beneath the Pseudoterrestrium. Active Submerged Hunters of Microorganisms and Small Prey in Lentic Water. Insects that Construct Underwater Shelters. Ambushers in Streams. Underwater Tunnel-Diggers, Aquatic Crickets, and Swimming Grasshoppers. Insects Inhabiting Rainwater. Hexapods in Mosses and Lichens. Insects of Phytotelmata. Insect Fauna Living in Insectivorous Plants. Aquatic Hexapods Active on Ice and Snow. Adults That Do Not Eat. Life in Water Without Oxygen. Insects on the High Seas. Marine Littoral Hexapods. Living in Hypersaline Water. Petroleum Flies. Larvae that Live in Sponges. Parasitoid Larvae in Aquatic Insects. Flies and other Insects that eat Snails. Flies that Give Wedding Presents. Aquatic Insects that kill People. Insects that use People for Bait. Flies in Hot water. Ants and water. What we Still need to discover.