172 PROCEEDINGS OF THE ACADEMY OF 



ro3y be taken on wing at this time in the neighborhood of the food plant of 

 the larva. 



Elachista Treitschke. 

 I would beg here to call the student's attention to the fact, that the genus 

 described in Paper No. 3, January, 1860, under the name Cosmiotes, is the same 

 as the present one. I much regret the existence of this error ; it is not, how- 

 ever, necessary to state how I came to be misled. 



Median vein of hind trings two-branched. Apical vein of fore wings with a 

 branch from its middle to the costa, bifid at the tip; median vein two-branched. 



E. prsematurella . Head, face and labial palpi grayish fuscous. An- 

 tennae rather dark fuscous. Fore wings fuscous with a purplish hue. Rather 

 behind the middle of the wing is a white band, silvery-hued, and near the 

 tip a costal and opposite dorsal spot of the same hue. Extreme apex of the 

 wing white, with a row of dark brown atoms in the cilia, which are fuscous. 

 Hind wings bluish-gray, cilia fuscou-< with a reddish hue. 



The imago may be taken on wing early in April. 



Brenthia. 



Fore wings almost cuneiform, rounded behind. The subcostal nervure sends 

 a vein to the costa from the middle of the cell, and subdivides into two branches 

 at the point of junction with the discoidal nervure ; arising from this are five 

 veins to the hinder margin, and the median nervure subdivides into two 

 branches at its tip. The subcostal is furcate at its base. The hind wings are 

 broad, irregularly oval. The subcostal is simple. The discoidal does not 

 join it, gives rise to three veins to the hind margin, and is deflected towards 

 the base. The median is two-branched, the upper one being bifid about its 

 middle. 



Head smooth. Forehead and face rounded. Ocelli large. Eyes oval, and 

 rather prominent. Labial palpi moderately long, rather slender, pointed and 

 somewhat squamose : the terminal joint shorter than the second. Antenna? 

 slender, simple in the $, rather densely ciliated in the tf. Tongue slightly 

 scaled and very short. 



The insect belonging to this genus, which is nearly allied to Glyphipteryx 

 of Hiibner, has the curious habit of strutting about broad leaves in shaded 

 places, with its fore wings somewhat spread and the hind wings turned 

 forward at right angles to the costa of the fore wings, so as to display the 

 surface of the under pair. It is easily recognized by this characteristic alone. 



B. pavonacella . Head and thorax fuscous; face whitish beneath. Labial 

 palpi white, with three fuscous rings, one at the end of the second joint, one at 

 the base of the terminal and one near its tip. Antennae fuscous, annulated with 

 white. Fore wings fuscous, mottled with whitish, especially on the middle of 

 the wing, with a fuscous spot on the middle of the disk, ringed with whitish. 

 Near the hinder margin is a black band, not extended to the costa nor the 

 inner margin, with two sharp indentations of the general hue internally, and 

 containing on its middle a streak of brilliant scarlet-blue metallic scales. 

 Along the costa are one or two faint spots of the same hue. Hind wings 

 fuscous, whitish at the base and along the costa, with a short white line 

 near the hind margin, above the inner angle of the wing, and a rather faint 

 scarlet-blue metallic hued band on the hind margin, from near the tip to 

 beyond the middle. The under surface of both wings show a metallic hued 

 subterminal band. 



Imago on wing in July and August. 



Pighitia. 

 Fore wings narrow, elongated, pointed and very slightly refuse on the costa 

 before the tip. The subcostal sends to the costa. beyond the apical third of 



[May.. 



