PLATE I 



A.—Plutella maculipennis: Adult. Much enlarged. Original. 

 B. — Plutella maculipennis: harva. Enlarged. Original. 

 C.—Pluiclla maculipennis: Pupa. Enlarged. Original. 

 D. — Leaf of mustard, showing injury by Plutella maculipennis. From Jones. 



(lo) 



