168 PROCEEDINGS OF THE ACADEMY OP 



fuscous. Fore wings golden yellow. At the base of the costa is a dark golden 

 brown patch, not extended beyond the fold, and margined behind and beneatli 

 with iridescent silvery. On the inner margin near the base and extended to 

 the middle of the margin is a rather long patch of the same hue, with an iri- 

 descent silvery internal patch and touched exteriorly with the same hue. A 

 large trapezoidal golden brown patch on the middle of the costa is margined 

 internally by a rather broad iridescent silvery streak, which is slightly dark 

 margined internally, having also an external silvery streak produced in the 

 middle of the wing toward the apex and beneath it, at its interior angle, a 

 brownish silvery blotch, pointing to the inner margin at the beginning of the 

 cilia. In the apical portion of the wing is a silvery streak, dark margined on 

 both sides behind, pointing into the costal cilia above the apex. The costa 

 from the trapezoidal patch to the tip, is touched with dark brown ; cilia dark 

 brown ; beneath the apex varied with silvery on the base of the cilia. Hind 

 wings dark brownish. 



Trypanisma. 



Fore wings ovate-lanecolate. The discoidal cell is rather narrow and elong- 

 ately oval. The subcostal nervure sends three nervules to the costa, the last 

 from the end of the cell, together with the apical branch which curves at its 

 origin to send off a very short and faint discal nervure, and at its middle 

 gives rise to a costal branch, becomes furcate behind the tip and delivers a 

 branch above and one below the tip. The median is three-branched, the mid- 

 dle branch being bifid. Submedian furcate at the base. Hind wings narrower 

 than the fore wings, with an intercostal cell at the base ; apex produced, deep- 

 ly emarginate on hind margin and anal angle rounded. The costa is slightly 

 emarginate in the middle. The discoidal cell broad, and closed by a very faint 

 nervure from the middle of the subcostal, which is furcate near the tip. The 

 discal nervule arises near the median, which is three-branched, with branches 

 rather approximated. 



Size small. Head smooth, with appressed scales. Forehead and face rounded 

 and rather broad. OcellL.none. Eyes oval, moderately prominent. Labial 

 palpi moderate, arched ; middle joint slightly thickened with scales beneath, 

 terminal as long as the second, smooth, pointed and tapering from the middle. 

 Maxillary palpi not perceptible. Antennae slender and simple ; about oue half 

 as long as the fore wings ; basal joint subclavate. Tongue scarcely so long as 

 the labial palpi. 



T. prudens. Head pale yellowish white dusted with fuscous. Face 

 yellowish white. Labial palpi pale yellowish white, with two dark brown 

 spots on the second joint and two rings on the terminal of the same hue, one 

 at the base and one near the apex Thorax yellowish, dusted with fuscous. 

 Antennas fuscous slightly annulated with yellowish. Fore wings fuscous, 

 tinted with yellowish, with a small ochreous yellow patch on base of costa, 

 one of the same hue on the middle of inner margin, extended to the middle of 

 the wing and a band of the same hue near the tip, much angulated or nearly 

 interrupted in the middle of the wing Hind wings fuscous. 



The generic characters of this insect approach those of Evagora. The larva 

 lives within a silken web woven on the under surface of the leaves of chestnut 

 oak. It feeds on the cuticles and parenchyma of both sides of the leaf, gaining 

 the upper side by round holes eaten through its substance, and just large 

 enough to admit the body ; of these there were three at various points of 

 the eaten surface. If alarmed the larva immediately retreats through the 

 opening last made to the web on the xinder surface. The pupa is robust, 

 almost ovoid and is contained in a slight cocoon woven on the leaf on which the 

 larvae feed. I have no description of the larva. It was taken July 22d, became 

 a pupa on the 27th, and an imago on August 8th. 



[May, 



