"Antennæ ¼-2/5, in male bi-pectinated, or more or less shortly bi-dentate. Palpi moderate, porrected, basal joint rough-haired, second joint rough-haired or almost smooth, terminal joint smooth, sometimes subclavate. Posterior tibiæ densely rough-haired. Fore-wings with vein 7 from angle of cell, 8 and 9 out of 10, rising from upper margin much before angle. Hind-wings as in fore-wings."--(Meyrick.) (Plate I., figs. 28 and 29 neuration of _Porina signata_.) Of this genus we have eight species in New Zealand. PORINA DINODES, Meyr. (_Porina dinodes_, Meyr., Trans. N. Z. Inst. xxii. 206.) (Plate XIII., fig. 8.) This handsome species was discovered at Invercargill by Professor Hutton. The expansion of the wings is 2¾ inches. The fore-wings are dark brown. There is an irregular white mark with a brown centre at the base, several white dots and crescentic marks near the middle, an oblique series of double crescentic marks followed by a considerably fainter series near the termen. The hind-wings are yellowish-brown; the cilia of all the wings are white, barred with dark brown. _The antennæ of the male are strongly bi-pectinated._ Described and figured from a specimen in Mr. Fereday's collection. PORINA MAIRI, Buller. (_Porina mairi_, Buller, Trans. N. Z. Inst. v. 279, pl. xvii., Meyr., Trans. N. Z. Inst. xxii. 207.) A single specimen of this fine species was discovered by Sir Walter Buller on the Ruahine Ranges, in the Wellington district, during the summer of 1867. The expansion of the wings is about 5 inches. "Wings large, broad, front-wings produced, ovate-triangular, pale dirty testaceous; six black spots terminating veins on outer margin, and bounded by a lunated marginal white band; a submarginal series of arrow-headed black spots, and beyond these a series of rounded spots, the first four encircled with white, the rest with pale brown; two broken, black discal lines filled in with brown; a broad irregular band to below centre of wing, beyond cell, and formed of three black lines with brown interspaces; a triangular white spot below cell and a white patch terminating it and traversed by two black crosses; two diverging black bars surrounded with white in centre of cell and a third surrounded with dirty testaceous near base; a large irregular patch of whitish-brown below end of cell, bounded on internal area by three unequally formed patches which together almost form the sides of a large triangle; two small spots near base; hind-wings greyish, becoming browner towards outer margin and crossed by eight interrupted black bars."--(Buller).