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- 

 foliclla 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) lespedesoefoliella Clem, resemble 

 somewhat the mines of the older larvae of G. salicifolidla. The larval 

 habits of the other American species are unknown, except G. juglandisni- 

 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 Lithocolletis ; 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 (Juglans 

 nigra) is naturalized in Europe. If it is the food plant of juglandiella , 

 then juglandis?iigracella or blandella may be the same insect. 



ORNIX. 



The species of this genus may be distinguished from those of Gracil- 

 laria 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. 



" In early life the larvae are leaf miners and make mines on the tinder 

 surface of leaves, difficult to distinguish from those of the genus Lithocol- 

 letis. 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' Froc. Ent. Soc. Fhila., 1861. 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 

 O. inusitatumella is the only known species which has a different habit. 



O. inusitatumella. IV. 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 



