Vol. xxiii] ENTOMOLOGICAL NEWS 167 



tips of the middle and posterior tarsi. Rarely the costal pale 

 triangle, instead of extending as a broad band along the costa, 

 is divided into two spots. 



The mine is placed on the under side of the leaf, and begins 

 as a linear winding mine, abruptly enlarging into a whitish 

 blotch, which later becomes wrinkled. The larva leaves the 

 mine, forming the characteristic cone. Pupation takes place in 

 a fold of the leaf. 



On the same bushes at the same time is found the larva of a 

 Gracilaria utilizing the entire leaf to make a very striking long 

 cylindrical roll. It begins by rolling under the lateral edge of 

 the leaf, continuing until the entire leaf is rolled up. The pupa 

 in this instance is formed within the roll. The imagoes which 

 issue from such rolls are almost indistinguishable from those 

 obtained from the cones and regarded as the true G. hclfra- 

 geella Cham. In these the separation of the costal triangle 

 into two portions is of more common occurrence than in G. 

 belfrageella. As yet I have been unable to find any mines 

 different from those of G. belfrageella^ and without such data, 

 I cannot decide that this is a different species. 



Gracilaria ostryaeella Chambers. 

 Gracilaria ostryaeella Chambers, Bull. Geol. Surv. Terr., IV, 121, 

 1878; Can. Ent, IX, 127, 1877. 



Chambers named this species from a knowledge of the mine 

 only, merely saying that "the larva when very small makes a 

 linear whitish mine in the upper surface of the leaves." The 

 same species is also briefly mentioned by Qiambers in the 

 Canadian Entomologist of the preceding year. The species 

 is omitted in Dyar's list. 



The mine to which Chambers refers is undoubtedly identical 

 with one I have frequently found in the vicinity of Cincinnati 

 on the upper side of Ostrya leaves. The mine is in general 

 similar to that of G. packardclla on sugar maple. Although 

 linear at first the mine soon spreads out into a whitish blotch. 

 lying over a vein, and sending out irregular finger-like pro- 

 cesses. The blotch portion of the mine later becomes trans- 

 parent and marked with a network of brownish veins. The 



