Insects Injurious to the Apple. 



37 



FIG. 24. — FIGUliE-' 



F. EiJemlen. 

 F-8 MOTH AT )!FST. 



hairs. The.se are placed iu an irregidar manner, and soon get 

 washed off l)y rain. The hairs, as seen in the photograph, are dark 

 and are not found on all tlie eggs 

 (Fig. 23). 



The ova hatch about the time the 

 leaves are beginning to expand. The 

 larvffi 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 Idue 

 with two small black spots ; the body is of xaiied 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. 

 Tliey devour the foliage with 

 rapidity when about lialf 

 grown, and continue to do so 

 until a few days liefore they 

 are full fed. They are mostly 

 mature by the end of June; 

 some sent me from Yorksliire 

 were just ready to spin Ity 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 

 ;;r(l 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 l)oughs of the trees. AVith 

 the silk are mingled bits of 

 bark, and they may be even 

 From these cocoons the moths hatch out 



[.1. r. ij. 11 



.— LARV.E OF THE FIGl'RE-OK-S M(_ 



Immature form.s on foliage. 



entirely covered with it 



in September and onwards into November. 



