towards base, anteriorly dark-margined; two obscure curved subdentate adjacent whitish lines about ⅓, followed by a dark line; a blackish discal dot; a very irregular dentate curved dark grey line beyond middle, followed by two adjacent whitish lines; a sharply dentate obscure whitish subterminal line, anteriorly dark-margined. Hindwings moderate, hindmargin rounded; markings as in forewings, but more obscure, paler and more suffused towards base. A fine species, with a peculiar bluish tinge. I took two specimens at rest on rock-faces in the Otira Gorge, at 1,800 feet, in January, and saw others. 48. Lar. cinerearia, Dbld. (Cidaria (?) cinerearia, Dbld., Dieff. N.Z., ii., 286; Larentia (?) invexata, Walk., 1199, Butl. Cat., pl. iii., 11; Larentia semisignata, Walk., 1200; Larentia inoperata, Walk., 1201; Larentia punctilineata, Walk., 1202, Butl. Cat., pl. iii., 12; Cidaria dissociata, Walk., 1734; Cidaria semilisata, Walk., 1735; Larentia corcularia, Gn., E.M.M., v., 61; Larentia infantaria, Gn., E.M.M., v., 62; Helastia eupitheciaria, Gn., E.M.M., v., 95;? Cidaria sphæriata, Feld., cxxxi., 14.) Male, female.—16–25 mm. Forewings moderate, hindmargin rounded; ochreous-whitish or grey-whitish, irrorated with grey; numerous dark grey or dark fuscous regular dentate striæ, tending to form dots on veins; two adjacent near base, two others before middle, and three beyond middle darker and more conspicuous, especially on upper half, where they are often marked with blackish; a small blackish discal dot; the three post-median lines twice irregularly sinuate in and above middle; a blackish interrupted hindmarginal line. Hindwings moderate, hindmargin rounded; pale grey, from ⅓ to hindmargin faintly marked with dentate angulated darker striæ. Varies considerably in size, colour, and strength of marking; but I can find no point of distinction to justify the separation of any form as a distinct species. Three main forms occur; one large, greyer, and more uniform, without strong markings; a second of middle size, whiter and generally strongly marked, sometimes bluish-tinged, only found in the hills; and a third small, greyish but ochreous-tinged, strongly marked; these are connected by scarcer intermediate forms, and are, I believe, due to the direct effect of food and situation. The larva feeds on lichens. Christchurch, Castle Hill (3,000 feet), Dunedin, Lake Wakatipu (3,500 feet), and probably generally, at rest on walls, fences, rocks, etc., from December to March, very common; fifty-four specimens.