LEPIDOPTERA, 



253 



The Apple ^wzzxAdXxxY.^ Bticculatrix pornifoliella (Buc-cu- 

 la'trix pom-i-fol-i-eria). — This insect differs in habits in sev- 



FiG. ^00.— -Gelechia pini/oliella, larva, pupa, adult, and leaves mined by the larva. (From 



the Author's Report for 1879.) 



eral respects from any of the other Tineids described here. 

 The larva infests the leaves of apple, and when full grown 

 it makes a small white cocoon which is attached to the 

 lower surface of a twig. These cocoons sometimes occur in 

 great numbers, side by side, on the twigs of an infested tree 

 (Fig. 301). They are easily recognized by their shape being 

 slender, and ribbed lengthwise. It is these cocoons that 

 usually first reveal the presence of this pest in an orchard. 

 They are very conspicuous during the winter when the 

 leaves are off the trees. At this time each cocoon contains 

 a pupa. The adult moth emerges in early spring. The 

 eggs are laid on the lower surface of the leaves. Each 

 larva when it hatches bores directly from the egg to the 

 upper surface of the leaf, where it makes a brown serpentine 



