160 THE CANADIAN ENTOMOLOGIST. 



Lithocolletis martiella Braiin. 



Lithocolletis mariieUa Braun, Trans. Am. Ent. Soc, XXXIV., 290, 

 1908. 



A single specimen of this species, bred from Betula lenta L., at 

 Balsam, N. C, July, 1911, confirms Dr. Dyar's somewhat doubtful record 

 of its food-plant as birch, and gives two widely-separated localities for the 

 species, the type locality being Kaslo, B. C. 



The mine, which is placed on the lower surface of the leaf, is elon- 

 gated, and the loosened epidermis is thrown into a series of fine ridges. 

 The pupa is not enveloped in a cocoon, but the one-half of the mine con- 

 taining the pupa is sparingly lined with silk. 



Lithocolletis betulivora Walsingham. 



Lithocolletis betulivora Walsingham, Ins. Life., Ill, 326, 1891 ; 

 Braun, Trans. Am. Ent., XXXIV, 339, 1908 ; Dyar, List N. A. Lep., 

 No. 6328, 1902. 



A single specimen of this species was bred from Betula lutea Mich., 

 at Balsam, N. C. The pale markings are suffused with yellowish to such 

 an extent that they are scarcely differentiated from the ground colour of 

 the wing, and dark scales are entirely lacking, except external to the pair 

 of spots at the apical third and in the apex of the wing. 



Coriscium cuculipennellum Hûbner. 



Coriscium cuculipenftellum Hûbner, Ges. eur. Schmett., VIII, Tin., 

 VI, Al. B. f. 2, 1831 ; Fernald, Can. Ent., XXV, 96, 1893; Dyar, List 

 N. A. Lep., No. 6401, 1902. 



I have found the mines of this species common in the vicinity of 

 Oxford, Ohio, upon the leaves of Green Ash ( Fraxiniis lanceolata Borck.) 

 and White Ash ( Fraxinus americajia L.). The mine, at first very narrow 

 and shining white, begins on the upper side near the midrib, usually fol- 

 lowing the midrib downward more or less closely for a length of 3-4 cm., 

 thence diverging and slanting outward to the margin of the leaf, where it 

 is scarcely more than .5 mm. wide. Here it enlarges into an elongate 

 white blotch 2-2.5 c"^- ^^"g ^"^ 5 "^'^- wide. The epidermis in this 

 blotch becomes so much wrinkled that the edge of the leaf is bent over, 

 entirely concealing the mine, except at the extreme ends. The loosened 

 epidermis is everywhere very thin. 



The larva later feeds within conically-roUed leaves, and spins the 

 characteristic suspended cocoon withm the roll. 



