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Страница 147
... pupa ; duration of the pupa state ; when the perfect insect emerges ; how it passes the winter and its habits up to the time of depositing its eggs " often involve earnest , long , and patient study and the united labors of individuals ...
... pupa ; duration of the pupa state ; when the perfect insect emerges ; how it passes the winter and its habits up to the time of depositing its eggs " often involve earnest , long , and patient study and the united labors of individuals ...
Страница 150
... pupa case is deposited containing a young tick . These pupa cases are found in the wool resembling brown seeds . Each female produces but two or three young , " therefore , they do not increase readily , When very numerous they cause ...
... pupa case is deposited containing a young tick . These pupa cases are found in the wool resembling brown seeds . Each female produces but two or three young , " therefore , they do not increase readily , When very numerous they cause ...
Страница 152
... pupa cases or cocoons under the rough bark of the tree , where they change to the pupa , which remains in the cocoon about two weeks , when the moth emerges to again deposit eggs in the more mature fruit late in July or early in August ...
... pupa cases or cocoons under the rough bark of the tree , where they change to the pupa , which remains in the cocoon about two weeks , when the moth emerges to again deposit eggs in the more mature fruit late in July or early in August ...
Страница 153
... pupa , remaining thus about 13 days , when the fly emerges to deposit eggs for another brood of worms , which , after coming to maturity pass the winter in their cocoons , the flies appearing again in the spring . Prof. Linter , of New ...
... pupa , remaining thus about 13 days , when the fly emerges to deposit eggs for another brood of worms , which , after coming to maturity pass the winter in their cocoons , the flies appearing again in the spring . Prof. Linter , of New ...
Страница 154
... pupa or inactive form from which tne fly emerges . During the first warm days of spring , this fly comes forth from its winter sleep , having passed that season either in its perfect state or as a pupa ; they then commence to deposit ...
... pupa or inactive form from which tne fly emerges . During the first warm days of spring , this fly comes forth from its winter sleep , having passed that season either in its perfect state or as a pupa ; they then commence to deposit ...
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