(Neuroptera) This order includes about 6,010 species spread all over the world. Insects of this order are of length ranging from 2 mm to 6.5 cm and their bodies are slim, smooth and covered with dander. Their heads move freely and they have big compound eyes. There are also three simple eyes or they may not exist entirely. The mouth parts are of the chewing type. The insects of this order have four membranous wings with a big number of veins. Many species have special glands that secrete waxy materials, a smell or adhesive materials to stick their eggs on plants. The metamorphosis type of this insect is complete (egg - larva - cocoon - complete insect). The species of this insect are very important in biological control programs because they are predators of many important agricultural pests. Generally, larvae feed on insects, but sometimes complete insects feed on honeydew honey secreted by aphids.
