Notes on Colcophora, zvitli Descriptions of Tzvo Nczv Species 167 



One specimen bred from a larva on swamp white oak, Quercus 

 platauoidcs (Lam.) Sudw. at Cincinnati. The cases were found 

 in the middle of July, attached to the upper side of the leaf, and 

 the larva, which at this period is nearly full fed, does not mine, 

 but consumes the entire leaf substance with the exception of the 

 lower epidermis. 



The case is of the same general character as the cases of C 

 tiliaefoliella Clem, and C. malivorella Riley. The entire length of 

 the case in a line from mouth to apex is 8 mm. The case, espe- 

 cially on the sides and in front, spreads out broad and flat at the 

 mouth, so that, when viewed from in front, the diameter at the 

 mouth is almost three times that of the neck just behind it. \'iewed 

 from the side, the upper edge is almost straight for a length of 

 about 6 mm., making an obtuse angle with the surface of the leaf to 

 which it is attached. Then, bending at an obtuse angle, it runs 

 backward horizontally for a distance of 3 mm. to the apex, which 

 is rounded and two-valved. The lower edge is constricted at the 

 neck, beyond it almost paralleling the upper edge. On the lower 

 edge, about two-thirds of the distance from the mouth to the ob- 

 tuse bend, there is a small, blunt, projecting tooth. Attached to 

 the lower edge of the horizontal portion of the case are two 

 crinkled convex flaps, one on each side. These flaps are larger 

 in proportion to the size of the case than the similar flaps on the 

 cases of C. tiliaefoliella Clem, and C. nializ'orella Riley. The color 

 of the case in general is blackish, with the flaps and extreme apex 

 dark brown. At the neck, on the under side, two whitish lines meet 

 in a \\ and diverge obliquely upward toward the bend of the c^se, 

 but do not meet on the upper side. 



The imago emerged on August 12th of the same year. It is 

 very distinct from any other described species of our fauna ; the 



line of black scales in the costal and apical cilia, and the forked 

 streak on the fore wing are its distinguishing features. 



Type in my collection. 



63 



