Austrocidaria bipartita

The larvae are grey in colour and have two raised areas on its abdominal segments. Prout first described the adult of this species as follows:

Fore wing : anterior of a line from the apex to two-sevenths of the inner margin the wing is light buff, lightly irrorate with fuscous along the costa; posterior of it the wing is drab irrorate with fuscous, the light buff, postmedial fascia being marked only between veins R, and M, and at the inner margin. Hind wing : costa and postmedial fascia broadly, subterminal fascia slenderly light buff; remainder of wing drab irrorate with fuscous and transversed by several slender, fuscous fasciae.Although this species can be confused with A. anguligera it can be distinguished by studying the pattern below the middle of the forewing as it has a distinctive, dark tooth-like marking. The female of this species has an ochreous-brown wing colour with white markings.

This species is endemic to New Zealand. It is found in the North, South and Stewart Islands as well as at the Poor Knights Islands.

The larvae of A. bipartita pupate in the leaf litter at the base of their host plant or alternatively in their host plant leaves. The adults of this species are on the wing all year round but are most commonly observed from September until April. Adults are nocturnal and are attracted to light. During daylight hours adults can be observed at rest on tree trunks.