70 TAPERS BY DR. B. CLEMENS. 



along the inner margin to the base, with dark brown scales 

 between their hinder ends, or exterior to the tip of the dorsal 

 streak, but sometimes absent. Nearly opposite the third 

 costal streak is a dorsal silvery streak dark-margined inter- 

 nally. No apical spot, sometimes with dispersed brown scales 

 beneath the last costal spot. The hinder-marginal line 

 blackish ; cilia pale fulvous. Posterior wings gray ; cilia gray, 

 with a fulvous hue. 



The larva mines the under side of the leaves of oaks ; 

 I have usually found it in the leaf of the chestnut oak, in 

 September. The mine is limited by two veins of the leaf, 

 and when completed the external epidermis is left transparent. 

 The " frass " is cast on the margins of the mine, and when the 

 larva is prepared to enter the pupa state it collects the grains 

 of "frass" and makes an oval outline of them within the 

 mine, or wall to its cocoon, leaving the cuticles transparent, 

 so that the pupa can be seen within. The imago appears 

 early in May. The body of the larva is cylindrical. It is 

 lemon-yellow along the dorsum, except the three anterior 

 rings, which are whitish, Avith a series of dark brownish 

 dorsal dashes beginning on the third ring ; on the eighth 

 ring, in some specimens, is a dorsal reddish-orange patch 

 Head whitish, tinged with pale brown. 



ei hhM- 6. L. argent ifimb 7- idl a* Antennas silvery, annvdated with 

 darkish brown. Head, front and thorax silvery-white. An- 

 terior wings silvery, pale golden from nearly the middle to 

 the tip, with a long basal dark-brown streak margined above 

 with golden, extending nearly to the first costal streak. 

 There are four silvery costal streaks, all dark-margined, the 

 first very oblique, the second convex toward the base of the 

 wing. The first costal dark margin is decided and extended 

 on the costa toward the base. Tavo silvery dark-margined 

 dorsal streaks, the first opposite the second costal streak. 



* I received one specimen of this from Dr. Clemens ; it is ailed to Cramc- 

 n Jlii, F., and Hcegericlla, Zell. The exp. al. (omitted by Dr. Clemens) is 

 oi lin. H. T. S. 



