SUPERFAMILY TINEOIDEA 127 



the early stages. In the later portions of the blotch the 

 substance of the leaf is consumed, rendering the mine dis- 

 tinct. 



The pupa is in a broadly oval, flat, yellow cocoon spun 

 in a fold of the leaf or in a crevice. There are two generations 

 a year. The larvae that mine in early July emerge as 



Fig. 41. A spray of hog-peanut with three types of leaf injuries. A, 

 flat blotch mines of Leucanthiza amphicarpeaefoliella; B, a shelter between 

 two leaflets made by the leaf -sewer, Stilbosis tesquella, within which mainly 

 the tissues of the uppermost leaflet are excavated; C, a tentiform blotch 

 mine of Lithocolletis morrisella. 



adults in late summer, hibernate as pupae and emerge in 

 early spring. 



Leucanthiza 



This is a small genus in which the larvae do all their 

 feeding in the mine and emerge just before spinning their 

 cocoons. The mines are irregular blotches on the upper 

 surface of the leaves. 



