. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. THE ORGANISM AND ITS ENVIRONMENT 361 Insects, particularly Diptera, are of considerable importance in the transmission of disease, flies by the mechanical conveyance of in- fected materials and mosquitoes by the inoculation of the host with the micro-organisms of disease. It is not our purpose here to discuss the hfe cycles of insects in reference to their importance to public health. However, the mosquito has played such an important role in the spread of disease that an understanding of its
. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. THE ORGANISM AND ITS ENVIRONMENT 361 Insects, particularly Diptera, are of considerable importance in the transmission of disease, flies by the mechanical conveyance of in- fected materials and mosquitoes by the inoculation of the host with the micro-organisms of disease. It is not our purpose here to discuss the hfe cycles of insects in reference to their importance to public health. However, the mosquito has played such an important role in the spread of disease that an understanding of its life history is properly a part of general information. All Diptera, including the mosquitoes, are insects of complete metamorphosis. The eggs of the mosquito (Fig. 217) are laid in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Buchanan, James William, 1888-. New York, London, Harper & brothers
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