. Domestic mosquitoes. Mosquitoes. DOMESTIC MOSQUITOES. moistened, however, they may remain dormant for weeks or even months. When immersed in water they promptly hatch. Under most favorable conditions the wigglers (fig. 4) develop in 6 to 8 days and change into the less active tumbler or pupa stage (fig. 5), from which the adult insect (title page illustra- tion and fig. 2) emerges about 2 days later. The complete develop- ment from egg to adult mosquito is, therefore, 9% to 12 days, or longer in cooler weather or under less favorable conditions. The house mosquitoes have a similar developmen
. Domestic mosquitoes. Mosquitoes. DOMESTIC MOSQUITOES. moistened, however, they may remain dormant for weeks or even months. When immersed in water they promptly hatch. Under most favorable conditions the wigglers (fig. 4) develop in 6 to 8 days and change into the less active tumbler or pupa stage (fig. 5), from which the adult insect (title page illustra- tion and fig. 2) emerges about 2 days later. The complete develop- ment from egg to adult mosquito is, therefore, 9% to 12 days, or longer in cooler weather or under less favorable conditions. The house mosquitoes have a similar developmental period, but they differ markedly from the yellow-fever mosquito in the egg stage. The eggs are laid in boat-shaped masses or rafts (fig. 6) directly on the surface of the water and, if dried, soon lose their ability to hatch. Biting Habits Figure mosquito. Egg of the yellow-fever About 100 times natural. 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 Bishopp, F. C. (Fred Corry), 1884-1970. Washington, D. C. : U. S. Dept. of Agriculture
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Keywords: ., bookcentury1900, bookpublisherwashingtondcusdeptofagriculture
