_Early Stages._--Very little is known of the early stages of this genus. [Illustration FIG. 101.--Neuration of the genus _Eunica_.] The butterflies are characterized by the dark-brown or black ground-color of the upper side, generally glossed with rich blue or purple. On the under side the markings are exceedingly variable and in most cases very beautiful. The genus is characteristic of the neotropical fauna, and there are over sixty species which have been described. The males are said by Bates, to whom we are indebted for most of our knowledge of these insects, to have the habit of congregating about noon and in the early afternoon in moist places by the banks of streams, returning toward nightfall to the haunts of the females. In this respect they resemble club-men, who at the same hours are generally to be found congregating where there is something to drink. Only two species are found in our region, and are confined to the hottest parts of Texas and Florida, ranging thence southward over the Antilles and Central America as far as Bolivia. (1) =Eunica monima=, Cramer, Plate XXI, Fig. 7, ♂; Fig. 8, ♀ (The Dingy Purple-wing). _Butterfly._--This obscure little butterfly represents in Florida and Texas the great genus to which it belongs, and gives but a feeble idea of the splendid character of its congeners, among which are some exceedingly beautiful insects. Nothing is known of its life-history. It is common in the Antilles and Mexico. Another species of the genus, _Eunica tatila_, has recently been reported from the extreme southern portion of Florida. Genus CYSTINEURA, Boisduval "And here and yonder a flaky butterfly Was doubting in the air." MCDONALD. _Butterfly._--Small butterflies, with elongated fore wings, the hind wings with the outer margin rounded, slightly crenulate. The head is small; the palpi are very delicate and thin, scantily clothed with scales. The costal vein of the fore wing is much swollen near the base. The subcostal vein of this wing sends forth two branches before the end of the cell. The upper discocellular vein is lacking; the middle discocellular is short and bent inwardly; the lower discocellular is almost obliterated, and reaches the median vein at the origin of the second median nervule. In the hind wing the cell is open, and the two radial veins spring from the same point. [Illustration FIG. 102.--Neuration of the genus _Cystineura_.] _Early Stages._--Very little is as yet definitely ascertained as to these. But one species is found within the limits covered by this work. Seven species have been described, all of them inhabiting Central or South America. (1) =Cystineura amymone=, Ménétries, Plate XXIV, Fig. 7, ♂ (Amymone).