Insects Injurious to the Apple. 



37 



[F. Edenden. 



FIG. 24. FIGURK-OF-8 MOTH AT REST. 



hairs. These are placed in an irregular manner, and soon get 



washed off by rain. The hairs, as seen in the photograph, are dark 



and are not found on all the eggs 



(Kg- 23). 



The ova hatch about the time the 



leaves are beginning to expand. The 



larvae at once feed upon them, usually 



taking their food singly, even if the 



eggs are laid close together. 



The caterpillar (Fig. 25) is very 



marked, owing to its head being blue 



with two small black spots ; the body is of varied hue ; some are 



yellowish-green, others bluish- grey and more yellowish-green below, 



with a broken yellow line along the back and another on each side 



below the air holes, and the segments have small black spots ; the 



pale legs are also spotted with black, as also are the sucker-feet. When 



full fed the caterpillars are 

 plump and very sluggish and 

 reach over 1 inch in length. 

 They devour the foliage with 

 rapidity when about half 

 grown, and continue to do so 

 until a few days before they 

 are full fed. They are mostly 

 mature by the end of June ; 

 some sent me from Yorkshire 

 were just ready to spin by the 

 first week in June in 1900, 

 others have been observed as 

 late as the 7th of July (1905), 

 a record in an old notebook 

 records one spinning on the 

 3rd of July (1884). Many of 

 the caterpillars leave the trees 

 when full fed and spin a rough 

 grey cocoon on any convenient 

 spot, others do so on the twigs 

 and boughs of the trees. AVith 

 the silk are mingled bits of 

 bark, and they may be even 



entirely covered with it. From these cocoons the moths hatch out 



in September and onwards into November. 



FIG. 25. LARV.E OF THE FIGURE-OF-8 MOTH. 



Immature forms on foliage. 



