Bees and Wasps
Bees and wasps cool high temperatures in their nests by standing still and fanning their wings. This ventilates the nest, forcing warm air outside. Honey bees, hornets, and paper wasps take the process a step further by gathering water and then spreading drops of water in the hive. When they fan their wings the water evaporation also cools the air.
Termites
Termites actually build air conditioning ducts into the structure of their mounds. The mud in termite mounds is designed with hundreds of veins running through it. The veins filter water from the mud when it's applied to the mound. As the water evaporates, the air inside the mound is cooled.
Ants
The Camponotus mus (a nectar-foraging ant) nests beneath rotting wood or stones in the ground. When the temperature gets too warm where they are, the ants simply move to a cooler nest. When they get too cool, they move to a warm nest. Ants that build their nests deep beneath the ground use the cooling temperature of the earth itself to keep the nest temperature down beneath the summer sun.