The expansion of the wings is 1½ inches. The fore-wings of the male are pale orange-brown; there is a doubly toothed shaded transverse line near the base, the teeth being marked with two black spots; _a conspicuous wavy transverse line runs from the apex to the dorsum_, and is also marked with several black dots; the space between the two transverse lines is paler than the rest of the wing; there is a row of small black dots on the termen, and the termen itself has two small projections. The hind-wings are yellowish at the base, becoming orange beyond the middle; there is a faint brownish transverse line near the base, and a conspicuous wavy transverse line at the middle, marked by a series of black dots; this central transverse line divides the yellowish ground colour of the basal area, from the orange ground colour of the rest of the wing. The female is larger and duller than the male; the fore-wings are yellowish drab, with the outer transverse line dull red; there is a series of minute black dots on the termen; the hind-wings are dull yellow, with a wavy central transverse line. The only variety of this species which has come under my observation is a male. In this specimen all the wings are pale yellowish-brown, with very broad black transverse lines. (See Plate X., fig. 27.) This insect is evidently closely allied to _Azelina fortinata_. It may, however, be distinguished from that species by the smaller projections on the termen of the fore- and hind-wings, and the dotted transverse lines of the male. The perfect insect appears from January till April. It is met with much later in the season than either of the two other species of _Azelina_. It frequents forest, and may be found on the blossoms of the white rata, but is, I think, the rarest of the genus. AZELINA FORTINATA, Gn. (_Polygonia fortinata_, Gn., E. M. M. v. 41. _Caustoloma_ (?) _ziczac_, Feld. cxxxii. 4. _Azelina fortinata_, Trans. N. Z. Inst. xvi. 106.) (Plate X., fig. 24 [M], 25 [F].) This beautiful insect occurs occasionally in forests in both the North and the South Islands. It has been taken at Wellington, Nelson, Castle Hill, Akaroa, Mount Hutt, West Plains and Otara.