Grasshoppers have two pairs of wings in the thoracic region. Medial thoracic or forewing and hind thoracic or hind wing. The front wings are short, narrow and stiff. They do not help to fly. These only cover the hind wings. Hence their elytra or wing cover or tegmina. The hind wings are large, broad, translucent and curtain-like. They help to fly. At rest the hind wings are folded. Each wing is composed of numerous small ducts and blood-filled veins. They are called nerves. Dr. Siddiq Publications