FAMILY TORT RI CI DM 



219 



occurring in beans and some other seeds and causing these 

 seeds to jump about in a very pecuhar manner. This is 

 caused simply by the jerking movements of the body of the 

 caterpillar within the seed. 



Clover-seed Caterpillar {GrajjJwlitha interstinctana, Clem.). 

 — The clover-seed caterpillar is often a serious pest to the 

 clover seed. Its work, however, is not confined to the seed, 

 but extends to the leaves, stems, or crown, so that on the 

 whole its capacity for mischief is very great. 



Fig. 1G9. — Codling moth {Carpocapsa pomonclla) : egg. 



The moths are very small and may be generally described 

 as dark brown or nearly black in color. The wing expanse 

 is from 0.31 to 0.36 of an inch. The majority are marked 

 by two small parallel, excurved, short, silvery lines at the 

 middle of the hinder border of each forewing so that when 

 the wings are closed the lines form a double crescent over 

 the back. (See Fig. 107, c and d). Some, however, are found 

 to have all traces of the crescents obliterated. Eight white 

 silky lines are disposed along the front border of each of the 

 forewings, which in common with the hindwings are deli- 

 cately fringed. The wings beneath are shining and silky and 

 have a greenish tinge in certain lights. 



