. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. 130 CIVIC BIOLOGY feeding upon minute forms of animal and vegetable life which are swept mto their gullets by the constant motion of little brush-like mouth-parts. A long respiratory tube comes from the eighth segment of the body, through which the larva breathes by opening it to the air. After undergoing three different molts the larva reaches maturity and changes into a pupa in from ten to fourteen days. The pupa differs radically. Fig. 67. Survey of mosquito breeding places by a
. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. 130 CIVIC BIOLOGY feeding upon minute forms of animal and vegetable life which are swept mto their gullets by the constant motion of little brush-like mouth-parts. A long respiratory tube comes from the eighth segment of the body, through which the larva breathes by opening it to the air. After undergoing three different molts the larva reaches maturity and changes into a pupa in from ten to fourteen days. The pupa differs radically. Fig. 67. Survey of mosquito breeding places by a normal-scliool class Equipment : bottles, tumblers, and saucers from the larva in appearance, and breathes from the ear-like organs on the thorax (Fig. 62). Except when disturbed the pupa remains at the surface of the water. After two days it splits down the back and the adult mosquito rises from the pupa skin. Anojyheles and Aedes lay their eggs scattered singly, those of Anopheles floating while the eggs of Aedes sink to the bottom (Fig. 62). The larva of Aedes resembles that of Culex, while that of Ano2jheles lies horizontally, just under the 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 Hodge, Clifton Fremont, 1859-; Dawson, Jean, 1873-. Boston, Ginn
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