Notoreas isoleuca

Meyrick described the species as follows:

♀︎. 20 mm. Head and thorax ochreous-yellow, mixed with black. Forewings with termen bowed, rather oblique; dark fuscous, irregularly sprinkled with yellow; a cloudy transverse streak of yellow irroration near base, and another of yellow and white scales near beyond it, bent near costa; a curved white streak at 1⁄3, suffused with yellow on costa and in middle; a rather irregular tolerably straight white streak in middle, suffused with yellow towards costa, middle, and dorsum; a white streak at 2⁄3, obtusely angulated in middle, yellow on costa; subterminal line very fine, yellow, irregular, forming small spots on costa and in middle: cilia white, basal half fuscous. Hindwings as in forewings, but first three streaks obsolete, other two nearer base, post-median curved, hardly angulated.

This species is endemic to New Zealand. N. isoleuca has been found around Arthur's Pass and Ben Lomond as well as Mount Peel.

This species normally produces two broods per year but it has been hypothesised that at some localities it may produce only once in a season. The female moth lays her eggs within the flower buds of their host plant. When the larvae emerge from their eggs, they eat into the leaves or buds of their host, hiding from predators. Once they are large enough, they emerge to feed from the fresh growth of the plant. N. elegans pupate in a loose cocoon on the ground under their host. The species spends approximately 43 days in their cocoon before emerging as an adult. N. isoleuca are day-flying moths. They are low but fast flyers and constantly vibrate their wings to enable them to take off rapidly.