Pasiphila plinthina

Meyrick described the species as follows:

Male. — 19 mm. Head, thorax, and abdomen whitish-ochreous, irrorated with reddish. Palpi 3, whitish-ochreous, towards base blackish beneath. Antennae whitish-ochreous, spotted with fuscous above, ciliations 4. Legs blackish, apex of joints ochreous-whitish, posterior pair wholly pale whitish-ochreous. Forewings with hindmargin very oblique, somewhat bowed, slightly sinuate above anal angle; whitish-ochreous, suffusedly irrorated with reddish, tending to form very obscure lines; a blackish irroration towards costa on basal fourth; edge of median band marked by series of black dots on veins, anterior from 3⁄8 of costa to 2⁄5 of inner margin, curved, posterior from before 3⁄4 of costa to 2⁄3 of inner margin, upper 2⁄3 tolerably regularly curved; a pale waved subterminal line preceded by a reddish fascia, forming a darker red spot above middle, another above anal angle, and a blackish costal spot; a black hindmarginal line : cilia ochreous-whitish, with an obscure reddish line, basal half with reddish-fuscous spots on veins. …

This species is endemic to New Zealand. It is found in the North, South Islands and Stewart Islands.

P. plinthina is on the wing mainly from June until September with occasional observations up to December, and as such it is regarded as a winter specialist. P. plinthina are attracted to light. Hudson explained that this species could sometimes be found resting on tree trunks but that it was more often collected when dislodged from foliage.

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