Studies in Relation to Malaria II. (Cont.) The Structure and Biology of Anopheles (Anopheles maculipennis)

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Abstract
The larva about to turn into a pupa comes to rest, the thoracic region becomes swollen, and the pupa gradually issues through a dorsal slit in the larval cuticle, which is ultimately thrown off with all its exterior chitinous appendages as well as those parts of the spiracles etc. which are superfluous.