POTATO TUBER MOTH 

 (Phthorimcea opercidella). 2 

 IMPORTED CABBAGE WEB WORM A Moth. B Larva, lat- 



(HeUula vndaK*). 1 eral view. C Larva, dorsal 



A Mature moth. B Larva, lateral view. view. D Pupa. E, F Seg- 

 C Larva, dorsal view. D Pupa. All three ments of larva, enlarged. (R-- 

 t linos natural size. drawn from Riley and Howard.) 





WORK OF THE POTATO-TUBER MOTH. 2 



Exterior view of potato. 



'Bur. Ent. Bull. 19. 



'Farm. Bull. 5iT. 



233 



