THE POTATO TUBER MOTH. 17 
The largest number obtained in one day from a single female was 
68, and this female on two consecutive days deposited 112 eggs. 
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Fig. 14.— Tender stems of tomato killed by potato tuber-moth larvae. Uncommon form of injury. 
(Original.) 
The length of the egg stage varies with the temperature. 
Eggs deposited in midwinter may require 34 days to hatch, while 
those deposited during July and August may hatch in 5 days. There 
55889°— Bull. 427—17 3 
