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Show 164 MR. A. G. BUTLER ON [Feb. 18, differing from both genera in its enormous sieve-like antennae. Attacus hercules, Misk. COSCINOCERA OMPHALE, n. Sp.1 Ferruginous ; wings crossed near the base by a rusty whitish stripe, oblique, bisinuated and angulated upon the median vein in the anterior wings, and nearly straight in the posterior wings; a second stripe of the same colour across the external third, parallel to the outer border, and slightly incurved towards the costa of anterior wings, bounded internally by a dark ferruginous or mahogany-brown stripe ; outer border dull ochraceous brown ; a large ocellus closing each discoidal cell, the centre formed by a white-edged triangular hyaline spot, with broad black-edged dull ochraceous iris : primaries with the ocellus elongated and subtriangular; apical area pinky white, bordered and longitudinally streaked with lake-red: secondaries with the ocellus almost circular : head and collar testaceous, the latter partially bordered behind with white; base of abdomen white. Wings below much paler and of a sordid clay-colour, brownish towards the outer border, which is testaceous; stripe across the basal area obsolete ; discal stripe more distinct and whiter than above, with dark brown internal border ; ocelli rather smaller than above, and with less vivid black margin: fore wings with the apical area less distinctly clouded with white; hind wings white at the base, the abdominal and external areas broadly, but not abruptly, darker than the fore wings : body testaceous, coxas tufted with white hair; venter with lateral white line and transverse preanal white belt. Expanse of wing 9 inches 7 lines. This species may be distinguished from C. hercules, Miskin (Trans. Ent. Soc. 1876, p. 7), by the redder and not black-bordered pale stripes of the upper surface, the ochraceous irides to the ocelli, and the more vivid instead of paler discal stripe of the under surface. Comparison with the Australian species will probably reveal other differences which are not apparent in Mr. Miskin's description. COSSID.E. Z E U Z E R A SIGNATA, Walker, Lep. Het. vii. p. 1537, n. 19. A single example of what seems to be a slight variety of this Indian species; unfortunately the type of Z. signata is much discoloured and somewhat worn. When more specimens are obtained from both localities, it will be possible to determine whether or not the differences which do exist are constant ; they are principally confined to the costal border of the fore wings. OPHIDERID^E. OPHIDERES DIOSCORE^E, Fabricius, Sp. Ins. ii. p. 212, n. 15. A worn, but unusually dark example of this form. 1 The type is unfortunately somewhat damaged, and has only the commencement of the tails. A rather larger example received since the reading of this paper has tails 3 inches 9 lines in length, and less spatulate in character than the species of Argcina, |