222 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



wing. Cilia white. Hind wings dark fuscous with white cilia. Abdo- 

 men dark fuscous above, underside whitish, anal tuft ocherous. Legs 

 ocherous white. 



Alar expanse. — 25 mm. 



Habitat. — Rockstone, Essequebo River, British Guiana; Cayenne 

 and St. Jean, Maroni River, French Guiana. Wm. Schaus, collector. 



Type.— Cat No. 13585, U.S.N.M. 



Cotype in British Museum. 



Of the group represented by 8. crocuta, genetta, and fraterna Felder; 

 larger than either of these and differing in the heavy, dark, washed 

 out bases of the transverse facias. It comes still nearer to the larger 

 S. binubila Zeller, which is even more like the following species, but 

 the size alone sufficiently separates both species. • 



STENOMA PHCEBE, new species. 

 Plate 9, fig. 42. 



This may best be described by comparison with the foregoing 

 species, to which it comes very close. The upper, costal, half of the 

 forewings is nearly pure white instead of merely lighter gray as in 

 S. addon, and only the two outer fasciae can be traced in this part of 

 the wing. The first, basal, fascia is represented by the dorsal spot 

 only, broadly washed out and somewhat nearer the base than in 

 S. addon. The series of small black marginal dots is rather more 

 distinct than in the former species. The hindwings whitish, light 

 fuscous toward tip, are strikingly lighter than the hindwings of 

 S. addon. 



Alar expanse. — 21-22 mm. 



Habitat. — St. Jean, Maroni River, French Guiana. Wm. Schaus, 

 collector. 



Type.— Cat. No. 13586, U.S.N.M. 



Evidently very close to I. binubila Zeller and nearly identical in 

 pattern, but the much smaller size and the different localities of the 

 two species make the distinctness of the present species reasonably 

 certain. 



STENOMA SIMILIS, new species. 

 Plate 9, fig. 43. 



Closely allied to Stenoma pliaibe, but smaller and with a more 

 sharply denned pattern. Labial palpi whitish shaded with fuscous. 

 Face silvery white. Head and thorax dark gray. Forewings with 

 costal half light, nearly white; dorsal half dark fuscous; three nearly 

 equidistant transverse oblique streaks; thebasal one stopping at asmall 

 black dot on the middle of the cell; the second one continued some- 

 what farther up and including a small black dot at the end of the cell; 

 the third reaching across to the costal edge; the bases of the two first 

 streaks are strongly washed into large blackish dorsal shades, reach- 



