Holocola parthenia

Meyrick described this species as follows:

Female. — 13 mm. Head, palpi, antennae, and thorax whitish. Abdomen grey-whitish. Legs dark fuscous, ringed with whitish, posterior pair whitish. Forewings elongate, costa moderately arched, apex round-pointed, hindmargin sinuate, rather strongly oblique; light brownish-ochreous, tinged with grey towards inner margin; a broad white streak along costa from base to apex, extremities pointed, margined beneath by a blackish streak from before middle to apex; about eight fine short dark fuscous strigulae on posterior half of costa; an erect leaden-metallic streak from anal angle, and another from middle of hindmargin, both touching margin of costal streak : cilia pale brownish-ochreous, with a blackish apical spot. Hindwings grey-whitish; cilia whitish. The black markings on the adults of this species is variable both in colour intensity and the extent of the markings.

This species is endemic to New Zealand. As well as its type locality of the Waitākere Ranges in the Auckland Region, it has also been observed in Whangārei, Wellington and in Southland.

The adults of this species have been observed on the wing from August to December. It is one of the earliest moths to emerge in the New Zealand spring and as such is often overlooked or under collected by entomologists. Adults of this species are attracted to light.