Extent of the wings from five to six inches; the surface of the primary pair of a livid hue at the base and dark brown at the extremity, the latter colour traversed by a yellow flexuose line near the middle of the secondary wings, slate-blue anteriorly, and black behind. On the under side the wings are very richly mottled, the ground colour being light brown, variegated with numerous undulating black lines, the anterior pair with five very irregular yellowish-white transverse bands, and four ocellated spots near the apex, the hinder one larger than the others, surrounded by a yellow ring and having a white point within, not in the centre, but inclining to the inner side: the secondary pair with three broad indistinct whitish bands, and near the middle three ocelli, the intermediate one minute, the hinder very large and surmounted by a black arch. The body is dark brown above. This insect inhabits an extensive tract of the warmer parts of South America. ARPIDEA CHORINÆA. PLATE XXIII. Pap. Chorinæus, _Fabr._--Pap. Arcesilaus, _Cramer_, Pl. 294, fig. A, B (male), fig. C, D (fem.); _Stoll’s Supp._ Pl. 6, fig. 1 (caterpillar), fig. 1, A (chrysalis)--Satyrus Chorinæus, _Godart_. Finding it impossible to include this insect, owing to its remarkable form, in any of the genera hitherto proposed, we have been under the necessity of assigning it a new name. Many of its characters seem to be quite peculiar both in the perfect and preparatory states. The species which makes the nearest approach to it is _Satyrus Philoctetes_, but the differences are considerable, as will be seen by comparing the adjoining figure with that insect. The costal line of the upper wings is very much arched, and the hinder margin is strongly falcate. The external edge of the under wings is likewise falcate posteriorly, and the anal angle is a little produced; the line from that point runs somewhat obliquely nearly to the middle of the hinder edge of the wing, where there is a broad obtuse oblique tail. This outline forms a broad, somewhat square figure, having perhaps rather a heavy appearance, but the curves are graceful. The caterpillar is naked, or covered only with short pubescence, thickest in the middle, and having two very long hairy appendages at the hinder extremity. The chrysalis is short, without any conspicuous projections, the abdominal portion very much incurved. [Illustration: PLATE 23. _Arpidea Chorinæa, with Caterpiller & Crysalis._ Surinam. _Lizars sc._]