280 MR. H. DBTJOE OS NEW [Mar. 28, I exhibit this evening a fine male specimen of Actias mimosce. This specimen emerged from one of three cocoons, deposited this year (1893) by the Hon. Walter Eothschild, F.Z.S., and, although I have had the cocoons on one occasion before, this is the first perfect specimen obtained. The following papers were read : — 1. Descriptions of new Species of Lepidoptera Heterocera from Central and South America. By Herbert Druce, F.L.S., F.Z.S., &c. [Eeceiyed March 28, 1893.] (Plates XIX.-XXI.) The following descriptions of ninety-eight new species of Heterocera from tropical America represent twelve families, four subfamilies, and forty genera, two of which are new. Many of the species of the Dioptidsp, are of considerable interest, as they very closely resemble some of the butterflies belonging to the family Danainae from the same localities. All the types are in my own collection. Fam. ^GERIIDiE. ^GERiA, Fabr. iEGEEIA (?) CERACA, Sp. n. Primaries dark purplish brown, a streak from the base to the end of the cell hyaline, beyond the end of the cell a large golden yellow spot ; the fringe dark brown. Secondaries hyaline, with the veins, outer margin, and fringe dark purplish black. Head and palpi black, the front of the head white, collar steel-blue ; thorax dark brown ; abdomen bright orange ; the two anal segments and the tuft dark blackish brown ; legs bluish black. Expanse ly% inch. Hah. British Guiana, Essequibo Eiver (Whitely, Mus. Druce). A fine distinct species quite unlike any other known to me. I have placed it in the genus ^geria with considerable doubt. Eam. Oastniid^. Castnia, Fabr. Castnia endelechia, sp. n. Primaries pale brown, almost white along the inner margin, a short white streak near the base, and a white band crossing the wing beyond the middle, from the costal to the outer margin ; the fringe pale brown. Secondaries pure white, the veins near the outer margin edged with bright red, a lunular-shaped black mark
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