. Animal activities; a first book in zoo?logy. Zoology; Animal behavior. 82 ANIM/tL joint commonly called the body, and back of that the smaller joints of the abdomen. The end of the tail is double as shown in the figure. One projection is the insect's propeller, and the other its breathing-tube, which it is constantly using when at rest, opening or closing at will the tiny valve at its ex- tremity. The mosquito larva, then, breathes air directly and does not take it from the water like the young dragon- fly. Like its mother, the larva is bloodthirsty and always hungry. At the en
. Animal activities; a first book in zoo?logy. Zoology; Animal behavior. 82 ANIM/tL joint commonly called the body, and back of that the smaller joints of the abdomen. The end of the tail is double as shown in the figure. One projection is the insect's propeller, and the other its breathing-tube, which it is constantly using when at rest, opening or closing at will the tiny valve at its ex- tremity. The mosquito larva, then, breathes air directly and does not take it from the water like the young dragon- fly. Like its mother, the larva is bloodthirsty and always hungry. At the end of about two weeks, after moulting several times, the larva changes to a pupa, . bending its head under its body as seen in the figure and losing its mouth alto- gether, but retaining its power of active movement. The breathing-tube at the end of its body disappears and it now takes air by two tiny projections on its back. Finally, the pupa rises to the surface of the water and again moults, producing the adult mosquito, which uses its cast-off skin as a boat on which it floats until its wings are dry and it is ready to fly away. Should its frail boat capsize and wet its mosquito would drown. It has been found that a little kerosene spread upon the water of stagnant pools will not only kill the egg-rafts as they float about but will also destroy the perfect insects as they emerge from their pupa-case boats. The imago now breathes, like other insects, by the spiracles along the sides of its body. It has but one Fig. 74.—Mouth of a Bug. a, antennae; /, labium; m, man. dibles and maxillae; d, eye. wmgs the Fig. Egg. raft of a 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 French, Nathaniel Stowers, 1854-. New York [etc. etc. ] Longmans, Green and Co
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecta, booksubjectzoology
