Megalestes

The Synlestidae are a family of damselfliescommonly known as sylphs or malachites. They occur in South Africa, Australia, and South America. These damselflies are 21 to 36 millimeters long, with slender abdomens. Species are generally metallic green to brown-tinged black in color. Damselflies of this family are predators. The nymphs live in rivers and streams, and can be found in stagnant pools during the dry season. There are eight extant genera. There are also several extinct genera known from fossils.