170 PROCEEDINGS OP THE ACADEMY OF 



The larva was taken June 16th, full grown and about to transform on the 

 limbs of the plum. Its head is black, body uniform reddish-brown with indis- 

 tinct papulae, each giving rise to a hair, and with pale brown patches on the 

 sides of the 3d and 4th segments ; shield and terminal prolegs, black. One 

 specimen had secreted itself under a turned up portion of the old bark of the 

 trunk. The cocoon is exceedingly slight, and the tail of the pupa is attached 

 to a little button of silk. The pupa is ovate, abdomen short and conical, 

 smooth ; color, 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 tbree 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 absolete from the third to the 

 fourth marginal branch. Beneath the apical is a discal nervule, which is obso- 

 lete posteriorly from its middle. The median is tbree-branched ; the submedi- 

 an, 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 The subcostal is obsolete toward the base 

 and bifid at the tip of the wing ; a discal nervule beneath it is obsolete posteriorly 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 smoo h. 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 pal- 

 pi are much less developed, and the tongue much shorter. 



S. tesquell a. Head and face grayish-silvery, having a greenish splen - 

 dent lustre. Labial palpi ochreous. Antennae dark fuscous. "Fore wings fus- 

 cous-golden, tinted along the base of costa with reddish-violet; with three 

 patches of raised scales, one in the fold near the base, one behind the middle of 

 the wing, and one near the tip on the inner margin, the latter two are large and 

 extended nearly to the costa. In certain lights these raised patches are golden 

 internally, while the spaces of the wing between them become dark fuscous and 

 with the light striking the wing from the tip the patches are dark ochreous 

 and the last is extended obliquely into the costa as a streak of the same hue. 



The tip of the wing is reddish- violet, in certain lights dark fuscous. The cilia 

 are very long and are extended along the hind margin beyond the middle of 

 the wing ; fuscous tinged with reddish. Hind wings dark fuscous, cilia the 

 same. 



Laverna Curtis. 



Fore wings pointed, oblique along the hinder margin, with five veins be- 

 neath the furcate apical vein. Discoidal cell narrow. Submedian furcate at 

 each end; basal fork long, the apical fork shorter. Hind wings rather refuse 

 on the costa before the tip ; hind margin rounded or cimetar-shaped from base 

 to apex. The subcostal is obsolete toward the base, simple, and runs into the 

 costa before the tip. Discoidal cell closed, with a discal vein furcate at the 

 tip. Median three-branched, the last two arising on a common base. 



Head smooth ; backhead or vertex elongated. Forehead obtuse, advanced ; 

 face retreating. Eyes oval, visible in front. Labial palpi moderately long, 

 curved, smooth but rather loosely scaled ; second joint flattened toward its end, 

 subclavate ; the third short, smooth and pointed. Antennae rather more than 

 one half as long as the fore wings, simple, setaceous, basal joint subclavate. 

 Tongue sparingly scaled, extremely short, not one-half as long as the labial 

 palpi. 



[May, 



