MAY, 1860. 117 



dark fuscous. Fore-wings grayish, very profusely dusted 

 with dark fuscous, with a dark-fuscous spot on the disk; 

 cilia ochreous-gray. Hind-wings pale ochreous-gray ; cilia 

 pale ochreous. Feet annulated with whitish. 



I have found this genus a very difficult one. It is of great 

 extent, and includes individuals of a variety of aspects and 

 more or less marked modifications in the labial palpi. The 

 oral parts in the doubtful species correspond so nearly to 

 those of the genus, that I have concluded, after much hesita- 

 tion, not to place them in separate groups, notwithstanding 

 the produced apex of the hind-wings in some of them. 



STROBISIA. 



Fore-wings obtuse and rounded behind. The subcostal 

 divides into four branches, with the apical branch simple or 

 forked. The discoidal nervure gives origin to a disco-central 

 branch. The median is four-branched ; submediaii forked at 

 the base. Hind-wings trapezoidal, not broader than fore- 

 wings, with the hinder margin slightly emarginate beneath 

 the tip. Subcostal bifid from the discoidal, which gives rise 

 to a disco-central vein. Median three-branched, the two 

 upper branches arising at a common base. 



Head smooth, with appressed scales. Forehead and face 

 rounded. Ocelli large. Eyes oval and obliquely placed. 

 Labial palpi recurved, moderately long ; second joint flattened, 

 smooth, with appressed scales; third slender, smooth and 

 pointed. Maxillary palpi short and distinct. Antennas 

 slender, simple ; basal joint subclavate. Tongue scaled, nearly 

 or quite as long as the thorax beneath. 



The structure of the insects here included, closely ap- 

 proaches that of the genus Geleckia f in which I placed them 

 in the first arrangement. I cannot believe, however, that 

 they are members of this group, and have hence removed 

 them.* The perfect insects are most commonly found in 

 shaded places, on the surfaces of leaves. They are active and 



* The bluntly rounded hind margin of the anterior wings is very peculiar, 

 especially in the broader-winged species Iridipennella. H. T. S. 



