78 



Insect Pests. 



The very glowing accounts so often given of the beneficent action 

 of introduced parasites is merely throwing back for years any possible 

 advance that might be made in this interesting subject. 



TORTRIX MOTHS ON THE APPLE. 



(Tortrix ribcana, Hb. ; T. heparana, Schiff. ; Tortrix rosana, Linn. ; 



T. podana, Sc. ; Sidcria achatana, Fab. ; Pyrodes rhcediella, 



Clerck. ; and Spilonota roborana, Tr.) 



The above are the chief kinds of Tortrix Moths which have been 

 sent to me as feeding on the apple. 



Few of the Tortricidse are to be met with on the wing before 



FIG. 71. TORTRIX M"TI 



(Horace Knight. 



Tortrix ( Lozota-nia) 

 Tortrix (Lzi>tn'nia) In'j.nrana. 



ibeann. 



Tortrix (Lozot:>< 



ia) ; 



June, but they go on appearing until August. The larva? are 

 very active and can usually be told by their curious sinuous back- 

 ward movements when they are touched ; they have the normal 

 number of legs, and can thus at once be told from the Winter Moth 

 larva?. The foliage and blossom is devoured by them ; the former 

 they frequently roll up or unite together with fine silken strands, and 

 the same is done with the blossom. In the young stages they feed 

 more freely, however, on the leaves, etc. The pupal stage is chiefiy 

 passed in the tubes or spun-together leaves where they have been 

 feeding. The winter is mostly passed in the egg stage, but some 

 hibernate as small larva; in cases of debris. 



