Platyptilia æolodes, Meyr.
Described (Trans. Ent. Soc. Lond., 1902, 278) from the Chatham Islands; but Mr. Philpott has now sent me two specimens from Invercargill—a very interesting record. It is allied to falcatalis, but smaller and darker, and distinguished by the prominent angulation of termen of second segment of forewings (in falcatalis the margin is somewhat bent but not angulated), and the principal dorsal scale-tuft of hindwings being hardly beyond the middle, whereas in falcatalis it is much broader and is considerably beyond the middle.
Platyptilia isoterma, n. sp.
♂. 18 mm. Head white mixed with dark reddish-fuscous, frontal tuft moderately long. Palpi brownish irrorated with dark fuscous. Antennæ grey, above with a blackish line. Thorax whitish irrorated with dark reddish-fuscous, metathorax suffused with black and edged with white. Abdomen dark reddish-fuscous sprinkled with whitish, and mixed with blackish on sides towards middle. Legs reddish-fuscous sprinkled with white, tibiæ and tarsi banded with white and dark fuscous. Forewings cleft from beyond ¾, segments broad, termen of first sinuate, of second bowed in middle; reddish-fuscous closely irrorated with whitish and sprinkled with dark fuscous, anterior ¾ transversely strigulated with white, especially towards dorsum; costal edge suffused with dark fuscous and strigulated with white; a triangular black blotch on costa at ⅔, its apex produced and extending to before lower angle of cleft, edged posteriorly by a fascia of brownish-ochreous suffusion crossing base of both segments, followed by a broader fascia of dark-fuscous suffusion, edged posteriorly by an even whitish line parallel to termen: cilia grey, on costa dark fuscous with a white spot before apex, on termen whitish towards base with a sharply marked even black basal line throughout, on dorsum mixed with black scales, forming a tolerably even line posteriorly, at ⅔ with a flat black scale-tooth preceded and followed by whitish patches. Hindwings cleft firstly from middle, secondly from ¼, segments moderately broad, termen of second subsinuate; grey; cilia light grey, on dorsum mixed with black scales throughout, with a moderate elongate-triangular black scale-projection beginning at ⅗.
Wellington; one specimen (Hudson). Allied to falcatalis and æolodes, but differs from both in the strong black entire line at base of terminal cilia of forewings. The species of this genus require careful discrimination, and probably more remain to be found in the mountains; their larvæ are usually attached to Compositæ (feeding variously on the flowers or leaves, or in the stems), and should be looked for.