Appearance
The adult "Anasa tristis" is a greyish-brown, somewhat flattened insect reaching a length of about 1.5 cm and a width of 0.75 cm. There is often a row of alternate brown and gold spots along the margin of the abdomen. Adults survive for three or four months.
Behavior
In the southern part of its range, the adult female "Anasa tristis" lays two or three batches of about eighteen eggs, but in the northern part of the range it just lays a single batch. The eggs are oval, somewhat flattened and bronze in colour, and are deposited on the underside of the leaves of the host plant. They may be clustered close together or more widely dispersed but are often regularly arranged. The eggs hatch after seven to nine days into nymphs which have five instar stages. The first instar nymphs are hairy and green and about 2.5 mm in length. Each successive instar is darker in colour, larger and less hairy. The fifth instar is dark grey, with developing wing pads and about 10 mm in length. The complete nymphal stage lasts about 33 days.References:
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