I am unacquainted with this species, which Mr. Fereday stated he was unable to identify. I have therefore inserted Mr. Meyrick's description without alteration. HYDRIOMENA RIXATA, Feld. (_Cidaria rixata_, Feld. cxxxii. 1; Meyr., Trans. N. Z. Inst. xvi. 75. _Coremia squalida_, Butl., Cist. Ent. ii. 505.) (Plate VII., fig. 11.) This pretty insect is very common, and generally distributed throughout the country. The expansion of the wings is about 1 inch. The fore-wings have a dull green patch near the base, with numerous dull brown and dull white wavy transverse lines; _there is a very broad blackish-brown central band paler in the middle, but almost black at the edges; this band has a large rounded projection on its outer edge near the middle, and below this projection it is deeply indented_; the remainder of the wing is dull yellowish-green, with several brown and white transverse lines; one of the white lines is more conspicuous than the rest and very wavy; there is a shaded oblique black mark from the apex. The hind-wings are very pale yellowish-brown; there are a few obscure brownish transverse lines near the dorsum, and a faint series of crescentic marks near the termen. The perfect insect appears in December and January, and frequents the overhanging banks of streams in densely wooded ravines, where it often occurs in the utmost profusion. HYDRIOMENA PURPURIFERA, Fereday. (_Cidaria purpurifera_, Fereday, Trans. N. Z. Inst. xvi. 119; Meyr., ib. 75.) (Plate VII., fig. 12.) This extremely pretty insect has been taken in the South Island at Mount Arthur, Mount Hutt, Castle Hill, Dunedin, and Lake Wakatipu. The expansion of the wings is about 1 inch. The fore-wings are rather bright green; there is a darker area near the base, _a very broad purplish-brown central band, with a large square projection on the middle of its outer edge; above this projection there is a very conspicuous white mark, bordering the central band_; the remainder of the wing is green; there is a wavy white line near the termen, and an oblique bluish-black mark near the apex. The hind-wings are pale brownish-yellow. This species is closely allied to _Hydriomena rixata_, but easily distinguished by its brighter green colouring, purplish central band with square projection, and broad white marking beyond the central band. The perfect insect appears in December and January, and frequents forest at elevations of from 1,000 to 3,000 feet. It is found in drier situations than the {50}preceding species, and is not confined to forest streams. It is common in certain localities, but is not nearly so generally distributed as _Hydriomena rixata_. HYDRIOMENA SIMILATA, Walk. (_Cidaria similata_, Walk. 1413. _Cidaria timarata_, Feld. cxxxii. 19. _Cidaria similata_, Meyr., Trans. N. Z. Inst. xvi. 76.) (Plate VII., fig. 14.)