110 



later, according to the weather. After this skin the 

 wing rudiments very distinctly make their appear- 

 ance, and become larger and whiter the nearer the 

 insect approaches to the perfect state. The body is 

 also of a light green, and the larvae have black eyes 

 and blackish antennee. At last the time arrives when 

 the insect assumes the perfect state ; when it retires 

 to a part of a leaf which it had selected, and after 

 having firmly fixed itself there, the back splits open, 

 and the beautiful winged chermes appears from the 

 nymph. The back of the thorax is of a light green, 

 the abdomen is marked with yellow wings, and the 

 membraneous wings with strongly-marked veins. 



Apple-bark Beetle (Bostrichus dispar), fortu- 

 nately, appears in England very rarely. The female 

 of this species bores into the wood of the apple-tree, 

 depositing there her eggs, usually, in the month of 

 May. Its perforations, in Germany, are so numerous 

 and extensive as frequently to destroy the tree. The 

 perforations are confined to the alburnum of the wood. 



Small-bark Beetle {Seolytus hcEmorrJious) .— 

 This is of still more rare occurrence than the preced- 

 ing. It is black, and the ends of the wing-cases red- 

 dish ; feet brownish red ; wing-cases furrowed longi- 

 tudinally, and distinctly spotted. The insect is very 

 small, the largest being no more than three-fourths 



