EXERCISE
EXERCISE
Collect cocoons and pupæ of insects and hatch them in a breeding-cage similar to the one illustrated in Fig. 149. Make several cages of this kind. Collect larvæ of several kinds; supply them with food from plants upon which you found them. Find out the time it takes them to change into another stage. Write a description of this process.
The plant louse could produce in its twelfth brood 10,000,000,000,000,000,000,000 offspring. Each louse is about one tenth of an inch long. If all should live and be arranged in single file, how many miles long would such a procession be?
 Fig. 148. Plant Lice |
 Fig. 149. Cage in which to breed Insects Flower-pot, lamp-chimney, and cloth |
Source: Agriculture for Beginners
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