ad 
9. 
10. 
AE 
12. 
ae ee 
EXPLANATION OF PLATE XVIII, 
PHTHORIMAEA OPERCULELLA. 
A potato plant showing injury caused by the larve. 
Moth resting on plant. 
Potato tuber showing evidences of caterpillar attack in the masses of 
excrement at the eyes. A cocoon on the tuber. 
Potato tuber cut open to show damage caused by caterpillar. 
Potato tuber showing the track of the caterpillar and the pupa. 
Young larva. 
Imago, male. 
» female. 
Pupa. 
Adult larva. 
Hggs deposited at the eye of a potato tuber, magnified 
(The hair-lines show the natural sizes. 
