JANUARY, 1862. 185 



The mine to which I refer may be found during the latter 

 part of August in the leaves of wild grape-vines. It is very 

 long, winding, linear and narrow, filled with blackish frass 

 and hence easily seen, differing thus from a Phyllocnistis 

 mine, which resembles the tracings left on leaves by snails. 

 When the larva is full fed, it enlarges the mine at its 

 extremity, without making the enlargement transparent, and, 

 making a fold in the leaf at this point, weaves its cocoon and 

 undergoes its transformation in the mine like a Phyllocnistis 

 larva. The larva is pale greenish, immaculate, long and very 

 slender, ivith the anal segments very -pointed. 



Since writing the preceding remarks on the larva which 

 makes the blackish mine in wild grape leaves, and which 

 I suspected might be a Lyonetia, I examined one of the 

 pupae I had obtained from the miner. This although dead 

 had completed its full development, and the markings on the 

 wing, extracted from its wing-case, were beautifully distinct. 

 The imago was certainly not L. speculella. In its unex- 

 panded state, a wing is quite opaque and the neuration very 

 indistinct, and I judge that the chitinic matter of the veins 

 is not secreted until after the escape of the imago from the 

 pupa-case. The neuration of the insect under consideration 

 was that of Phyllocnistis, and so also was the ornamentation 

 of the wing ; and it appeared to me to be distinct from that 

 of P. vitigenella, although very similar to it. 



Tenaga, new gen. 



Hind-wings lanceolate. Without discoidal cell. The 

 costal vein is delivered to the costa about its apical third. 

 The subcostal simple, almost or quite obsolete from the 

 middle to the base of the wing. The discal vein is central, 

 much attenuated through the middle of the wing, giving rise 

 to a branch to the inner margin about the middle of the wing, 

 the base of which is extremely attenuated, becoming furcate 



