218 



THE PROTECTION OF WOODLANDS. 



break off and burn from May till the middle of June all shoots infested. 

 Shoots attacked are easily seen, but the insect must be looked for below 

 where the twig breaks. 

 The Pine-bud Tortrix, Retinia turionana, attacks Pine plantations of 5 



>g- 53. 



The Larch Mining-Moth 

 (all magnified three times). 



a. Moth. 



5. Larval covering formed of 

 leaf- case. 



c. Caterpillar. 



d. Pupa. 



a. Larvie in leaf-cases. 



&. Naked larva?-. 



c. Needles hollowed out. 



to 15 years old, but seldom occurs in large numbers, and as not often all the 

 side-buds forming the whorl are injured, one of these generally becomes 

 a leading - shoot. It is smaller than Tortrix buoliana ; as also is 

 the Pine Resin-gall Tortrix, Retinia resinella, common in Scotland, 

 which bores into shoots below the whorl of buds, and lives inside a gall 

 formed by resin outflow. Branches become twisted, and break off easily. 



