48 THE CANADIAN ENTOMOLOGIST. 



white. Thorax and primaries dark iron gray, or brownish ; primaries pale 

 whitish gray along the dorsal margin, dusted with brown. A narrow, 

 brown streak from the fold, which widens into three small spots, once near 

 the base, once towards the middle, and once behind the middle. Seven 

 (or eight ?) indistinct pale costal streaks, the first before the middle, the 

 last close to the apex ; those in the apical part of the wing are longer than 

 those about the middle, and extend nearly across the wing, and all are 

 internally dark margined. A white spot at the extreme apex, very small, 

 and followed by a minute dark brown dot, behind which is an indistinct 

 brown hinder marginal line. Ciliae of the general hue. Alar ex. nearly 

 yi inch. 



At the bottom of p. 116, v. j, ante, I have mentioned a mine on the 

 upper surface of the leaves of Haw trees, which resembles that of Litho- 

 colletis Virginiella, on the upper surface of Ostrya leaves ; and which I 

 then supposed to be the mine of an undescribed Lithocolletis. (As will be 

 hereafter explained, there is no such species as L. Virginiella, and the 

 supposed mine of that species proved to be the mine of L. tritenceanella. 

 (But of that hereafter.) The mine on the upper surface of the Haw leaves 

 proves to be that of the Ornix above described. This mine is white, 

 with the frass scattered, and much of it attached to the upper cuticle. It 

 is large and nearly circular, and when completed the leaf is folded 

 upiuards. The larva never leaves the mine, but pupates in it, in a brownish- 

 red cocoon attached to tJie upper cuticle. I have never seen it on any leaves 

 except those of Crataegus tomentosa, and never on those, except in one 

 small piece of woodland containing about ten acres, near Covington, 

 Kentucky. There they are very abundant, and I have found multitudes 

 of them containing larvae and pupae, and empty ones with the pupa case 

 projecting through the upper cuticle, from May to November. I have 

 never ?nct with any other Ornix on the leaves of C. tomentosa. It is a very 

 difficult species to rear, as out of at least one hundred mines that I have 

 gathered containing the larvae and pupae, I have succeeded in rearing 

 but two specimens of the imago. 



Dr. Clemens states that his O. crataegifoliella has the labial palpi 

 whitish; and does not mention the annulus ; and he says that the fore- 

 wings have a few whitish streaks in the apical part of the whig. His 

 description is scarcely sufficient to enable one to determine a species 

 among those which resemble each other so closely as do many species of 

 this genus. But if he had mentioned the annulus on the palpi, and had 



