New Yokk Aguicultukal Experiment Station. 283 



Treatment. — As the insect works within the leaf, arsenical or 

 other sprays would have little if any effect. The only vulnerable 

 point seems to be in the method of passing the winter. By 

 destroying the fallen leaves, as by plowing them under, the 

 insects within them will be destroyed, and thus the species held 

 in check. 



TISGHERIA MALIFOLIELLA Golem. 



Order Lepidoptera. Family Tineidw. 



The mines of this species were very common in the leaves in 

 the apple orcharde examined at Albion and Geneva and were 

 received from Brockport. At Albion at least forty per ct. of 

 the leaves were infesfted. 



The mines are in the upper side O'f the leaf and are somewhat 

 trumpet shaped. The small end is often curved and marked with 

 crescents of white. The dead and dried leaf tissue turns reddish 

 brown in sharp contrast to the green color of the healthy leaf. 

 At Plate XLI, Fig. 1, an external view of a mine enlarged to 

 twice natural size is shown. 



The caterpillars feed and pupate in the same mine. Brunn'^states 

 that this species probably passes the winter within the mine in the 

 larva state. Our observations were similar, exceptt in one case, 

 when on Oct. 29 a larva was found evidently about to pass to the 

 chrysalis stage, as shown much enlarged at Plate XLI, Fig. 4. 

 At Fig. 3 one of the mines cut open exposing the caterpillar is 

 shown, 'and at Fig. 4 a single caterpillar. Both are much 

 enlarged. But little is known of the life history of this species 

 and the pupa has not been described. In this State we have 

 found it in Ontario, Wayne and Monroe Gounties. 



'Cornell Univ. Agr. Exp. Sta., 2d Kept., p. 156. 



