Izatha heroica

Philpott described the female of the species as follows:

♀. 32 mm. Head and thorax white. Palpi white, basal half of second segment externally black, also an obscure blackish ring near apex, terminal segment with a sprinkling of black scales forming an indefinite ring at tooth. Antennae fuscous mixed with white, basal segment paler. Abdomen ochreous-whitish, apical segment brown. Legs grey-whitish, tarsi banded with dark fuscous. Forewings elongate, broad, costa well arched, apex obtuse, termen rounded, oblique; white, densely irrorated with pale fuscous; seven blackish spots on costa, first at base, second at 1⁄4, third at 1⁄2, seventh at apex, and remaining three at equal distances between third and seventh; a blackish spot in disc obliquely beyond second costal, and a linear blackish mark on fold beneath this; three blackish spots forming a triangle in disc at about middle, the most apical obliquely beyond third costal; a less clearly defined spot towards apex; a series of blackish spots on termen: fringes white. Hindwings grey-whitish with an undefined dark discal spot: fringes grey-whitish. A very distinct form, larger and without the dark fasciae of the other white species. The wingspan is 23–29 mm (0.91–1.14 in) for males and 27–32 mm (1.1–1.3 in) for females. Adults have been recorded in January, February and early March. …

Izatha heroica is endemic to New Zealand and can only be found in the South Island. Although the species prefers the west side of the Island it has been collected in Nelson, Marlborough, Marlborough Sounds, Westland, Fiordland, North Canterbury, Buller, Otago Lakes, Central Otago, and Southland.