The best known and most common species of this genus is _H. Cupido_, which is rather smaller than _H. Gnidus_. The former is commonly named the Golden-spot, and the latter the Silver-spot Butterfly. The wings of _H. Gnidus_, in the male, are white on both sides, with a slight tinge of yellow at the base, and the outer margin black. At the hinder extremity of the secondary wings there is a row of narrow white marks, which is double at the anal angle; tails black on both sides, the two longest ones tipped with white. The upper wings beneath have a white line dividing the black border behind the middle, and the under pair are ornamented with twenty-one silvery spots, three of which at either extremity are elongated and placed on a white ground, while the rest are insulated and on a ferruginous ground; all of them edged with black. The female is larger than the sex just described, and differs in having a larger fulvous space at the base of the wings, and in having it bounded externally on the under side of the upper pair by a wide black patch; the greater part of the surface of the hinder wings is black, and the posterior row of white crescents is simple: body white, the thorax yellow; antennæ black, ringed with white. The caterpillar is white, and clothed with long hairs of the same colour; the head yellow, surmounted by a tuft of red hairs. It feeds on the leaves of the passion-flower, and changes into a brown chrysalis, which has a tuft of red hairs at the head and tail. This species, as well as _H. Cupido_, is a native of Surinam. ERYCINA OCTAVIUS. PLATE XXIV. Fig. 3. Pap. Octavius, _Fabr. Mant._--Pap. Faunus, _Fabr. Species_.--Pap. Chorineus, _Cramer_, Pl. 59, fig. A.