^'■i [November 



color; the Antlsplla larvae are white or whitish with bhick dorsal and ven- 

 tral spots, while the Asjyidisca larvae are reddish-brown. The disk of the 

 latter is likewise always fixed by a button of silk to some object in the 

 neighborhood of the food plant and the pupae must be kept in a dry ves- 

 sel after the disks have been cut out, otherwise the insects will not come 

 to maturity. On the other hand the Antisiyilse require a damp situation 

 after entering the pupa state. 



1. A Ostryaefoliella. The larva) may be found on the leaves of 

 Iron-wood during the latter part of September and early in October. 



About the lOtli of October all the mines are untenanted. There may be 

 a spring brood in the leaves of Ostrya but I have not observed them. 



The mine is large when compared to those found in the leaves of other 

 plants and the hole left by cutting out the disk is out of proportion to the 

 size of the mined portion. 



2. A. Saliciella. From the beginning to the middle of July the lar- 

 va may be taken on the leaves of yellow willow. The mine is very small, 

 the excised portion with which the disk is formed, taking up the greater 

 portion of it. I noticed in this larva a habit, which may be generic, but 

 if so it has escaped my observation; the larva, after cutting out its disk, 

 lets itself down by a thread, and in the middle of July the disks may be 

 found suspended under Willows as the larva lets itself down to the surface 

 of the ground. My specimens were taken on July 28rd when the mines 

 were generally deserted. 



A larva of this genus mines the leaves of wild cherry in July. The 

 mines are usually near the base of the leaf and are more elongated than 

 any others I have found. The mine is a short tract, not broader than the 

 short diameter of the disk, which is cut out from the end of the mine, the 

 hole occupying its entire breadth. If the species is distinct, and this I am 

 disposed to doubt, it may be called A. Pniniella. 



NEPTICULA. 



HABITS OF THE LARV.ffi. 



These larvae mine very narrow serpentine paths in the interior of leaves, 

 the mine being always on the upper surface. The mines vary much in 

 form, being sometimes a slender gallery or line, either simple, or enlarged 

 towards the end into a blotch, or a complete blotch. 



When the larva is full fed it quits the mine, cutting for this purpose 



