The expansion of the wings of the male is 1½ inches, of the female 1-5/8 inches. The fore-wings are _very pale ochreous-brown_; there are two interrupted jagged transverse lines near the base; a single very indistinct line in the middle; a double, nearly continuous jagged transverse line beyond the middle; a double jagged line near the termen completely interrupted in the middle; there is generally a dark patch on the termen just below the apex of the wing. The hind-wings are very pale ochreous. There is a series of black dots on the termen of both fore-wings and hind-wings, and the termen of the hind-wing is slightly indented. This species varies a good deal in size; the specimens from Stewart Island are {83}considerably larger and have more distinct markings, than those found in the vicinity of Wellington. The larva is cylindrical, of even thickness throughout, and almost uniform dull greyish-brown in colour, occasionally with a series of small oblong black marks on segments 5, 6, 7, 8, and 9. It feeds on the young leaves and buds of the ake ake (_Olearia traversii_). It is extremely difficult to find as it almost exactly resembles a twig of its food-plant. It is full grown about April. The pupa is concealed in the earth. The perfect insect appears from October till March. It seems to prefer cultivated districts, and is generally observed at rest on garden fences or tree-trunks. It also frequents flowers in the evening. SELIDOSEMA SUAVIS, Butl. (_Pseudocoremia suavis_, Butl., Cist. Ent. ii. 497. _Pachycnemia usitata_, Butl., Cist. Ent. ii. 501. _Pseudocoremia lupinata_, Meyr., Trans. N. Z. Inst. xvi. 98. _Boarmia suavis_, Meyr., Trans. N. Z. Inst. xxiii. 101.) (Plate IX., fig. 3 [M], 4 [F].) This species is very common and generally distributed throughout the country, and has occurred as far south as Stewart Island. The expansion of the wings is 1¼ inches. The fore-wings of the male are _dull yellowish-brown, speckled with black_; there are two curved transverse lines near the base; a very obscure line near the middle, darker on the costa; two doubly curved lines beyond the middle, slightly darker on the dorsum; and two very faint jagged lines near the termen. The hind-wings are pale ochreous, tinged with brown near the termen. The female has narrower wings, shorter body, and is usually duller in colour than the male. This insect is rather variable, some specimens of both sexes being much darker than others; but all the forms may usually be recognised by their dull speckled colouring and absence of conspicuous markings. The larva feeds on the white rata (_M. scandens_) and the tawa (_Beilschmiedia tawa_).