THE CANADIAN ENTOMOLOGIST. 47 
_ mines, however, are by no means so perfect. Possibly the form of the 
mine may be useful as indicating the affinities of the species. G. desmodi- 
foliella Clem. at first makes a narrow linear short mine on the underside of 
the leaf, ending in a small tent mine, which is indistinguishable from that 
of Lithocolletis desmodiella Clem., in the same leaves; afterwards it leaves 
the mine and rolls the leaf downwards from the tip. The mines of G. 
(Parectopa) robiniella and G. (Parectopa) lespedesæfoliella Clem. resemble 
somewhat the mines of the older larvae of G. salicifoliella. The larval 
habits of the other American species are unknown, except G. juglandisnt- 
gracella, which makes at first a short linear mine ending in a white blotch 
on the under surface ; at this stage it is indistinguishable from the young 
mines of some species of Zéfhocolletis ; when it leaves the mine it feeds, 
and then pupates under the edge of the leaf turned up. I have seen no 
account of the European G. juglandiella. The Black Walnut ( Fuglans 
nigra) is naturalized in Europe. If it is the food plant of juglandiella, 
then juglandisnigracella or blandella may be the same insect. 
ORNIX. 
The species of this genus may be distinguished from those of Gracid- 
Jaria by the roughened head, the somewhat broader primaries and the 
duller colors. 
Many of the species resemble each other very closely, so that, as Mr. 
Stainton says, the specific characters are to be sought for in the ciliae. 
“Tn early life the larvae are leaf miners and make mines on the wader 
surface of leaves, difficult to distinguish from those of the genus Lzthocol- 
fetis. 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. When they are full fed a small portion of the edge of 
the leaf is turned over, and the larva weaves its cocoon within the cone 
thus made.”—Clemens’ Proc. Ent. Soc. Phila., 1867. p. The italics in 
this quotation are mine. Mr. Stainton gives substantially the same 
account of their habits. And I believe the species described below as 
©. inusitatumella is the only known species which has a different habit. 
O. inusitatumella. LN. sp.? 
Dark iron gray, almost brown. Labial palpi whitish, with a dark 
brownish gray annulus on the third joint before the tip. Head dirty 
grayish mixed with brown. Antennae gray brown, faintly annulate with 
