MAY, 1860. 129 



of silk. The pupa is ovate, abdomen short and conical, 

 smooth ; colour dark reddish-brown. I do not know on what 

 part of the tree the larva feeds. 



STILBOSIS. 



Fore-wings narrow and pointed. Discoidal cell open, 

 elongated and very narrow. Subcostal nervure, with three 

 nervules to the costa from the cell, and an apical branch 

 which sends a nervule to the costa from its middle, and is 

 bifid at the tip of the wing ; the apical branch is nearly 

 obsolete from the third to the fourth marginal branch. Be- 

 neath the apical is a discal nervule, which is obsolete pos- 

 teriorly from its middle. The median is three-branched; 

 the submedian simple. Hind-wings setaceous ; the discoidal 

 cell is open and moderately broad toward the base of the 

 wing. The subcostal is obsolete toward the base and bind 

 at the tip of the wing; a discal nervule beneath it is obsolete 

 posteriorly from its middle. The median subdivides into 

 three separate branches. 



Head and face perfectly smooth. Ocelli none. Eyes small, 

 oval and visible in front. Labial palpi moderate, somewhat 

 curved, slender, smooth and pointed ; terminal joint as long 

 and as thick as the middle, and very acute at its apex. 

 Antennae rather thick, simple, somewhat roughened, rather 

 short; basal joint smooth and subclavate. Tongue short. 

 This genus is nearly related to Cosmopteryx of Hiibner,* but 

 the labial palpi are much less developed, and the tongue 

 much shorter. 



S. tesquella.^ Head and face grayish-silvery, having a 

 greenish splendent lustre. Labial palpi ochreous. Antennae 

 dark fuscous. J Fore-wings fuscous-golden, tinted along the 



* It also shows affinities with StatJimopoda, but differs widely from both in 

 the shorter and thicker antennae. H. T. S. 



f I received three specimens of this from Dr. Clemens. The exp. al. is 4J 

 lines. H. T. S. 



J Dr. Clemens should have added "with the tip white." H. T. S. 



K 



