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The Odonata order consists of the dragon- and damselflies. The Odonata are beneficial insects causing no plant damage. The larvae are aquatic. The adults are predacious feeding on a wide variety of adult rice insect pests including lepidopterous moths and adult leafhoppers and planthoppers. The wings are membranous and have numerous veins. The wing venation serves as a key character in identifying Odonata species. A key character is the pterostigma, a prominent cell, usually opaque and colored, near the tip of each wing.