98 BULLETIN UNITED STATES GEOLOGICAL SUEVEY. 



apex, as is usual, are fully as wide as the fore wings, and approach them 

 in shape. The costal and dorsal margins are almost equally arched; 

 each rounds off toward the apex almost equally at about the apical 

 third of the wing, and the apex is rather obtuse. They are very un- 

 like anything else I have met with in the genus; and if the species 

 had been previously described, I think they could not have been over- 

 looked. The specimen was not pinned when I received it, and therefore 

 I cannot suspect that it was a manufactured species. It belongs no 

 doubt to the Oak-feeding group. 



Possibly it may be T. zelleriella Clem., which I have not seen. Dr. 

 Clemens says, "Hind wings bluish-gray, tinted with yellow externally 

 toward the tip." "Bluish-gray" would hardly describe the color of 

 the hind wings, which are of a very pale whitish-yellow; but this is 

 the only Tischeria that I have seen which has the " hind wings tinted 

 with yellow" along the costal margin "toward the tip". But if it is 

 that species, it is strange that Dr. Clemens has not directed attention 

 to the extraordinary width of the hind wings and their comparatively 

 rounded apex. 



As above stated, I have but a single $ and no 9 . Dr. Clemens's 

 description of the $ applies well enough, except in the particulars just 

 stated; but he describes the supposed 2 of zelleriella as something quite 

 different, and he bred zelleriella from mines on the upper surface of Oak 

 leaves. I have another species which I have labelled zelleriella f, and 

 which I have bred frequently from mines on the upper surface of Oak 

 leaves. This species agrees with Dr. Clemens's account of zelleriella, 

 except that the hiud wings are not tinted with yellow, as above de- 

 scribed in the $ , and the hind wings of the ^, if they can be called 

 bluish-gray, are very pale. The 9 agrees better with Clemens's descrip- 

 tion of zelleriella 9 . 



In this species, the abdomen is fuscous, the anal tuft yellow; there is 

 no fuscous spot on the under surface of either pair of wings in either 

 sex; the legs, palpi and face, and antennae are very pale lemon or 

 whitish-yellow. In the $ , the fore wings are deep saffron or almost 

 reddish-yellow, becoming deeper and more purple toward the apex, 

 with the dorsal cilia paler; hind wings and cilia leaden-gray. The $ 

 differs by being much paler yellow on the fore wings, and the hind wings 

 are also paler and wider; though not nearly so wide, and tapering much 

 more gradually to the acute apex, than in latipenella, with which it other- 

 wise agrees, except that it lacks the yellow tint along the apical part 

 of the costa. It also differs from the <? by having the abdomen yellow 

 instead of fuscous. The mine also seems to differ from that of zelleriella, 

 being whitish, elongate, rather narrow, and the cuticle contracted, and 

 it is placed iudifferently at any part of the upper surface, whereas Dr. 

 Clemens states that the mine of zelleriella is at first a white blotch, but 

 subsequently becomes brown, and the margin of the leaf is curled. 



I have known this species for years, but hesitated to describe it as 

 new, lest it might prove to be zelleriella. I am, however, pretty well 



