so [November 



(). C. Tiliasfoliella. The larva feeds on the leaves of the Liiideu 

 from the beginning to the latter part of May. 



The case is black, somewhat pistol-formed ; straight along the upper edge, 

 turned abruptly down so as to form a handle-like appendage behind, with 

 a toothed, flattened, projection about the middle of the under edge, whence 

 to the mouth of the case it is cylindrical. The body of the^ larva is dull, 

 dark brown and the dorsal plates and head black. 



At this date the larva does not mine the leaf, but eats holes in it, devour- 

 ing its substance. The case is fixed to the under surface of the leaf and 

 is easily seen even on the leaves of the higher branches. 



The larva enters on pupation in the latter days of May or early in June. 



7. C. Querciella. The larva feeds on the leaves of Oaks in October. 



It does not make a mine at date, but picks out the parenchyma of the 

 leaf from the under surface, leaving the net-work of veins and the upper 

 epidermis of the leaf entire. 



The case is blackish-brown and smooth, the larva permitting the lower 

 edge of the case to come in contact with the leaf. The case is slightly pis- 

 tol-formed; the portion near the mouth circular and deflected, beyond which 

 it widens and rises on the upper edge to a hump or projection about the 

 hinder third, whence the outline descends to the posterior end which is 

 squarely excised. The under edge is curved to a notch nearly opposite to 

 the hump on the upper edge. 



The habits of the larva are similar to the European C. Ibqj'nndla; but 

 the case differs from it in form. 



LITHOCOLLKTIS. 



HABITS OF THE LARViE. 



The larvae mine the leaves of trees, shrubs or low plants, separating ei- 

 ther the upper or lower cuticle and feeding on the inner substance of the 

 leaf. When the mine is on the upper surface, or at least most frequently 

 when it is in this position, the leaf becomes folded and curved at the place 

 mined, and the separated cuticle is gathered into folds or covers the cur- 

 ved portion so as to make a capacious habitation. Some of the miners of 

 the upper surface of leaves make large blotches, or tracts and when the 

 mines are fresh the separated cuticle is whitish and very noticable. The 

 miners of the under surface, cause the upper cuticle to become discolored 

 in patches. ;ind this with the fold of the side of the leaf i.s often sufficient 



