Chrysopidae is a family containing the Lacewing insects. The estimates number of species are well over 1,000.
Most species are green, but you can get brown ones too. They get their common names after the delicate-looking, transparent wings.
Lacewing larvae are perfect allies to have in your garden. The larvae will inject a special digestive fluid into its prey, such as aphids! They suck up the end product, sometimes using what's left of the aphid as a covering to conceal themselves.
Some lacewings are vegetarians, feeding on nectar and pollen. This means that they'll do some pollination in the garden, too.