The aphid group of insects include the plant louse, the scale bug, the mealy bug, leaf hopper and cicada. They feed on the juices of plants and have sucking mouth parts. Some have two pairs of wings and some are wingless. Both pairs of wings are very thin and when they hold their wings over their bodies, they form an upside down V that looks like the roof of a house.
Most of these bugs do a great deal of damage to plants and crops.
These insects undergo incomplete metamorphosis.
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