LETTER OF OCTOBER lorn, 1859. 27 



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

 will verify my diagnosis. 



Head smooth (with a cap of curved scales overarching 

 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. Antennae 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, Avith 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 m \ 

 perfect insect is very beau- ^ [ \ 

 tiful. I will not describe J ! 

 it, although your specimens ,y 

 will not appear until next J^ '_ 

 spring. 



I send you a leaf of 

 Ostrya Virginica, contain- 

 ing what to me is a novel J,\v ■ ■'£ / /■ % 

 mine. I found it for the v- 7 

 first time a few days ago, J^ HIP^/ ^ 

 when looking for cocoons tO r ' 7 

 intended for you. I should V ~' 7 

 be glad to learn whether s I 

 you know of any larva hav- 1.^ x f 

 ing a similar habit. The ^ ■" r 

 mine begins along the mid- <, 5: 

 rib, and scarcely ever ex- V / 

 ceeds the limit of the two V 

 veins, between which it is as8 ^»| e . c .r- 

 first commenced. Its pe- 

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



