516 Mr. L. B. Piout on 



Differs from normal Stenalcidia in the more roumled f ire 

 wing. Agrees in venation (SC 1-2 of fore wing coincident, R 2 

 central) and other points of structure. 



Iridopsis albescens, sp. n. 



? . 41 mm. — Head, body, and wings whitish, the wings 

 sparsely dusted with brown, smoothly scaled, and with some 

 iridescence ; the lines slender, dark grey. Fore wing with 

 first line from before one-third, commencing in a somewhat 

 diffuse dark spot on costa, outaugled in cell, then oblique 

 ii wards to inner margin at two-sevenths; median shade 

 weak, from a diffuse dark spot in middle of costa, crossing 

 the cell-spot, and becoming more distiuct at inner margin; 

 cell-spot reniform, clear white, somewhat raised, surrounded 

 by some dark shading ; postmediau line from just beyond 

 two-thirds costa to about middle of inner margin, forming 

 a sinus between R 3 and M 2 , and another towards inner 

 margin, rather strongly elbowed just below M 2 ; antemedian 

 preceded and postmediau followed by weak ferruginous- 

 brown shades ; subterminal pale line indicated by dark 

 shading on either side, strongest in anterior half of wing ; a 

 series of black terminal spots between the veins. Hind wing 

 with rather distinct antemedian line from costa towards 

 middle to inner margin at about two-fifths; an elongate, 

 somewhat raised, clear white cell-mark, with fine dark circum- 

 scription ; postmedian angled on radial fold (R 2 ), then in- 

 curved, touching the posterior margin of cell-spot, followed 

 by weak, diffuse, ferruginous-brown line; subterminal line 

 indicated by dark shading on either side. Fore wing beneath 

 dirty white, with dark discal spot and dark submarginal 

 band, which leaves the apex pure white, nearly touches the 

 termen from R 1 to R 3 , becomes narrow and separate from 

 termen to M 2 , and is scarcely traceable beyond; hind wing 

 beneath dirty white, with indistinct dark apical spot. 

 " Venezuela," without more exact locality ; one ? . 



Iridopsis nephotessares, sp. n. 



3 . 45 mm. — Coloration and general aspect of /. rupertata, 

 Ye\d., = salmonearia, Ob., basal and median areas of fore 

 wing very nearly as in that species, the median shade not 

 appreciably double, ending in a conspicuous, strongly angled, 

 dark mark on inner margin, which is not distinctly ex- 

 pressed in rupertata ; postmedian line distinctive, strongly 

 oblique inwards, and thickened from above R 2 to lower angle 

 of cell ; very shortly bent outwards along M 1 , moderately 



