LETTER OF OCTOBER 10TH, 1859. 



27 



characters, and beg, when your specimens appear, that you 

 will verify my diagnosis. 



Head smooth (with a cap of curved scales oterarching 

 the vertex from behind ; this may be owing to the pinning), 

 with the scales of clypeus somewhat produced into a point 

 beneath. Ocelli none. Forehead or vertex rounded. Eyes 

 very small, not visible from above and scarcely visible in 

 front. Antennas held extended laterally, very short, scarcely 

 one half as long as the fore-wings and about twice the length 

 of the head ; rather thick, obtuse, with diameter equal, rough- 

 ened with scales. Maxillary palpi none. Labial palpi none. 

 Tongue none. 



I supposed at first this insect must belong to Tinagma, 

 but it differs from it in the neuration of the wings, in orna- 

 mentation, and in its cha- 

 racters as given above. The 

 perfect insect is very beau- 

 tiful. I will not describe 

 it, although your specimens 

 will not appear until next 

 spring. 



I send you a leaf of 

 Ostrya Virginicd, contain- 

 ing what to me is a novel 

 mine. I found it for the 

 first time a few days ago, JB 

 when looking for cocoons j|j 

 intended for you. I should V ; 

 be glad to learn whether S 

 you know of any larva hav- l|j 

 ing a similar habit. The 

 mine begins along the mid- 

 rib, and scarcely ever ex- 

 ceeds the limit of the two 

 veins, between which it is 

 first commenced. Its pe- 

 culiarity consists in the construction of lateral walls of " frass" 



