Mesothorax is enlarged bearing one pair of wings with on or two veins. Hind wings are
reduced to halteres. A quiescent stage is present in the life history.
Female
: Body segmentation is indistinct. Body wall naked and covered with a waxy
coating. They are wingless, legless and suck the plant sap.
The first instar nymph is active and is known as crawler which moults and becomes
legless. e.g. Coffee green scale
Coccus viridis
.
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