Mr. H. Druce on new Species of Lepidopfera. 213 or less diagrammatic and that the position, rather than a correct delineation, of the various folds is sought to be indicated, with the view of introducing in a single figure as many of them as possible, since all are not, present in any one species. EXPLANATION OF PLATE XL A. Fiys. 1-3. Diagrammatic sections of a shell of Claiisilia with portions of the shell-walls removed, to show the positions of the various lamellce. 1, front view ; 2, back view ; 3, seen from below. Fig. 4. Front view, with outer wall and columella removed, to show the pUcce. a-l. These letters correspond with those prefixed to the terms given in the first column of the table. el. Clausilium. s. Sinus. c.p. Callus palatalis. sut. Suture. XXIX. — Descriptions of new Species of Lepidoptera from Cen-tral America. By Herbert Druce, F.L.S., F.R.G-.S., F.Z.S. The new species will be figured in the * Biologia Centrali-Americana.' Fain. Sphingidse. Subfam. Sphinqinj:. Oryba, Walk. Oryba imperialis. Clanis imperialis, Druce, Biologia Centrali-Americana, Heterocera. vol. i. tab. iii. fig. 1 (1883). Primaries and secondaries bright green : primaries crossed about the middle from the costal to the inner margin with a wide band of darker green, edged on each side with a greyish line, the base dark brown ; a convex wide black line extends from the apex to the anal angle ; a narrow brown line crosses the wing beyond the middle from the costal to the inner mar-gin ; each side of the line is irrorated with greyish scales ; the fringe brown, excepting just at the anal angle, where it is yellow : secondaries crossed by two black bands, the outer band being the widest and thickly irrorated with greyish scales at the anal angle ; the fringe bright yellow, excepting
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