(LITHOCOLLETIS) NOVEMBER, 1859. 73 



epidermis as a circle, while beneath it is raised and pro- 

 minent. 



9. L. lucetiella* Antennae silvery. Head, tuft and 

 thorax silvery. Anterior wings silvery from the base to the 

 middle, and thence to the tip golden, with a golden costal 

 streak from the base not extended to the middle. About 

 the middle of the wing is a silvery band, broadly margined 

 internally with golden, and with a minute black point on the 

 costa internally ; a costal silvery spot, margined internally by 

 a black spot, nearly opposite to which is a large dorsal silvery 

 streak margined internally by an oblique black line; near the 

 tip is a costal, silvery, unmargined streak curving to the tip ; 

 cilia golden at the tip, and on inner margin silvery. No 

 apical spot nor hinder-marginal line. Hind-wings silver- 

 gray, cilia the same. Abdomen blackish, tipped with silvery- 

 gray. 



The larva mines the under side of the leaf of Tilia Ameri- 

 cana (bass wood) in July, September and October. The 

 mine is most frequently nearly square in form, and when 

 completed both cuticles of the leaf are left nearly transparent, 

 and the leaf is not folded. The " frass" is cast on the edges 

 of the mine. It weaves an oval cocoon, thin enough, how- 

 ever, to permit the pupa to be seen through the cuticles. 

 The larva is cylindrical. The he.ad pale brown; the body 

 pale greenish-white, with a series of dorsal brown spots from 

 the third ring posteriorly. The imago appears in August 

 and May. 



10. L. obstrictella. Antennae silvery beneath, blackish 

 above, with a whitish band near the tip. Front silvery, 

 with a reddish tinge on the forehead. Tuft and thorax 

 reddish-orange. Fore-wings deep reddish-orange, with three 



* I received five specimens of this from Dr. Clemens; it is very distinct from 

 any European species. The exp. al. (omitted by Dr. Clemens) is 3| lin. 

 H. T. S. 



