11. DIASPIDIDAE (Armoured scale)
Adult female lacks antennae, legs, and wings.
The body is covered by a hard, waxy, shell like substance
e.g. Coconut scale
Aspidiotus destructor
.
12. KERRIDAE (Lac insect)
Females are highly degenerate without legs, wings and antennae.
The body is irregularly globular.
Body is enclosed in a thick resinous cell.
e.g. Lac insect
Laccifer lacca
. Dermal gland secretions of this insect provides the sticklac.
13. PSEUDOCOCCIDAE (Mealy bugs)
Body is elongate oval in shape.
Body segmentation is distinct.
Body is covered by long radiating thread of mealy secretion.
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Functional legs are present in all instars.
Wings are absent.
e.g. Coconut mealy bug,
Pseudococcus longispinus
.
Nymphs and adults suck the sap and affect the growth of spindle leaf.
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