176 PAPERS BY DR. B. CLEMENS. 



The larva is dark bright green, with a darker vascular 

 line ; head brownish. The body is rather thick, and of 

 nearly uniform diameter. The summer brood leave their 

 mines towards the latter part of August, and in oaks, I think, 

 in July. 



There may be found in oaks a mine very similar to the 

 above, that is about a line wide towards its larger end, but 

 which is about two-and-a-half inches long* And another 

 much narrower than either, which is not much contorted, 

 but nearly straight, running along the veins and midrib and 

 measuring at least four inches in length. 



14. N. ros-afoliella. In the leaves of dwarf wild rose, 

 Bos a lucida, early in September. The mine is very serpen- 

 tine, frequently running around the edge of the leaf including 

 its teeth, moderately broad, nearly filled with a broad blackish- 

 brown frass line, the grains of which are dispersed or have 

 a wavy arrangement in the later part of the mine. In the 

 early portion, the tract is rilled with the excrement of the 

 larva. 



The larva is lemon-yellow; head and spot on the middle 

 of the second segment pale brown. I have no doubt about 

 the distinctness of this species from any other mining the 

 leaves of plants allied to the rose family. 



It may however be identical with or closely resemble the 

 European N. anomalella. 



Ornix. 



Habits of the Larva. 



In early life the larva? are leaf-miners and make mines on 

 the under surface of leaves, difficult to be distinguished from 

 those of the genus Lithocolletis. Towards maturity, however, 

 they abandon their mines and feed under a portion of a leaf 

 turned down from its edge, which is bound closely with silk. 



* Perhaps the mine of a Lyonetia, allied to L. Clerkella. H. T. S. 



