The expansion of the wings is about 1 inch. The fore-wings are bright green, with three very distinct wavy black transverse lines; the first near the base, the second a little before the middle, and the third considerably beyond the middle; between these there is a number of fainter fine wavy lines. The hind-wings are whitish with several very faint wavy transverse lines; the cilia of all the wings are dull yellowish-brown.
The perfect insect appears in January, February, and March. Described and figured from a specimen in Mr. Fereday's collection.
HYDRIOMENA ARIDA, Butl.
(Melanthia arida, Butl., Cist. Ent. ii. 505. Cidaria chaotica, Meyr., Trans. N. Z. Inst. xvi. 76. Cidaria arida, Meyr., ib. xvii. 64.)
(Plate [VII]., fig. 15.)
This species has occurred in the South Island at Akaroa, Mount Hutt, Arthur's Pass, and Dunedin.
The expansion of the wings is 1 inch. The fore-wings are dull grey; there is a fine yellowish transverse line near the base, and a very broad central band with a prominent projection somewhat below the middle, almost touching the termen; there is a brown dot above the middle of the wing and numerous fine brown wavy lines in the central band; the veins are marked in white near the termen. The hind-wings are pale ochreous, with a few very faint transverse marks near the dorsum. The termen of the fore-wings is slightly bowed in the middle.
The perfect insect appears in January and February, and frequents forest, sometimes being found as high as 2,600 feet above the sea-level. Described and figured from a specimen in Mr. Fereday's collection.
HYDRIOMENA SIRIA, Meyr.
(Cephalissa siria, Meyr., Trans. N. Z. Inst. xvi. 93.)