PLANT LICE
weather may give the young lice a long wait for their first meal.
The approaching time of hatching is signaled in most
Fig. 93. Hatching of the green apple aphis, Aphis pomi
A, the egg. B, an egg with the outer coat split. C, the same egg with the inner shell split at one end. D-F, three successive stages in the emergence of the young insect. G-J, shedding the hatching membrane. K, the empty eggshell. L, the young aphid
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