costa moderately arched, slightly sinuate in middle, apex round-pointed, hindmargin very obliquely rounded; whitish-ochreous, sometimes with scattered fuscous scales, especially on costal half anteriorly; sometimes a dark fuscous suffusion towards base of costa; two fuscous dots, somewhat obliquely placed, faintly indicated in disc before middle; a conspicuous round dark fuscous dot in disk beyond middle; sometimes a posterior transverse line indicated with dark fuscous scales, angulated in middle, indented above middle: cilia whitish-ochreous. Hindwings whitish-ochreous, greyish-tinged, more or less suffused with light fuscous-grey, except towards base; cilia pale whitish-ochreous. Arthur's Pass (4,700 feet), and Mount Arthur (4,000 feet), in January; three specimens. Probably nearer the Tasmanian P. cataxera than any other described species. Semiocosma, Meyr. Sem. mystis, n. sp. Differs from S. peroneanella only as follows: usually larger; thorax with the two dorsal black marks united in front to form an irregular bar; forewings with the black postmedian discal mark connected with the mark beneath middle of disc by a bar, and not touching costal spot above it (in S. peroneanella it is connected with spot above it, and not with mark beneath middle of disc); hindwings more whitish, the grey colour forming a discal spot and subterminal band (in S. peroneanella the grey is generally diffused posteriorly). In my description of S. peroneanella this is included as a geographical (South Island) form of that species; as I now prefer to separate it as a distinct species, the said description should be corrected accordingly. The synonymy is correct as quoted. S. peroneanella occurs at Auckland, Hamilton, Napier, and Wellington; S. mystis at Nelson, Christchurch, and Dunedin; both in December and January. I have seen a fair number of specimens, and the two forms appear constant. Sem. apodoxa, n. sp. Male, female.—21–26 mm. Head whitish, lower margin of face and maxillary palpi dark fuscous. Palpi white, second joint with lower half and a subapical ring fuscous, terminal joint with a blackish median band. Antennæ dark fuscous. Thorax whitish, with a few fuscous scales. Abdomen grey-whitish. Legs dark fuscous, posterior pair whitish. Forewings elongate, costa slightly arched, apex obtuse, hindmargin nearly straight, rather oblique; white, irregularly irrorated with light greyish-fuscous; a small fuscous spot at base of costa, and a dot near base in middle; a slender dark fuscous streak from ¼ of costa to disc