Insects Injurious to the Apple. 



97 



amount of damage to fruit foliage, but it has frequently been .sent 

 since. 



As will be seen from what we know at present of its life-liistory, 

 there is no vulnerable point at which we can direct our energies 

 when it increases sufficiently to become a pest. 



LlFE-HlSTOKY AND HaBITS. 



Tlie moth appears in April, June, August and September and 

 again in November. It is about -^ inch across the expanded wings ; 

 the front wings are narrow and lanceolate, brownish-white, with a long 



FIG. 85.— THE APPLE LEAP MINER {Lyonelia derchella). 

 I, cocoon, seen at A ; 11, larval mine. 



brown line beyond the middle with a narrow fuscous fascia and three 

 fuscous streaks, at the apex is a prominent black spot, the fringe is 

 brownish-grey and so are the hind wings and their fringes. Some 

 specimens have the fore wings almost bronzy, especially after death, 

 the colours quickly darkening ; the abdomen is clothed with shiny 

 steely scales and the dusky antennas are long and slender, the legs 

 are shiny brown with pale tarsal bands and the hind legs have 

 prominent tibial spurs. 



The females (and possibly the males) hibernate in crevices, under 

 rubbish, especially where they can keep dry. Some were found in 



