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 



