. Elementary entomology. Entomology. FLIES, MOSQUITOES, AND MIDGES 223 forked abdomen. They breathe through the respiratory tube pro- jecting upward from the abdomen, which is thrust through the surface of the water as the wriggler rests at the surface. The wrigglers feed on bits of organic matter and microorganisms. The pupa has the head and thorax very remarkably enlarged, and there are two breathing tubes which project from the back of the. Mil ^''^v-^fl â k . S. "â -^ . Hk^ -:>^ ' &:^ ^^^^Ife^^Hii^riflBjfe ^9 ^^â i^^l^'Sk^K IBhB Fig. 35- AVing of a mosquito (Miiuso/na titillaii
. Elementary entomology. Entomology. FLIES, MOSQUITOES, AND MIDGES 223 forked abdomen. They breathe through the respiratory tube pro- jecting upward from the abdomen, which is thrust through the surface of the water as the wriggler rests at the surface. The wrigglers feed on bits of organic matter and microorganisms. The pupa has the head and thorax very remarkably enlarged, and there are two breathing tubes which project from the back of the. Mil ^''^v-^fl â k . S. "â -^ . Hk^ -:>^ ' &:^ ^^^^Ife^^Hii^riflBjfe ^9 ^^â i^^l^'Sk^K IBhB Fig. 35- AVing of a mosquito (Miiuso/na titillaiis Walk.) enlarged, showing scales on veins, and a portion of same further enlarged (After Felt) thorax. The pupa stage lasts from one to three days, the whole life from t^g to adult requiring from eight days to two or three weeks. Not only are mosquitoes exceedingly annoying, rendering some sections almost uninhabitable, but it has been shown-that malarial fever is transmitted only by mosquitoes of the genus Anopheles, and that the dreaded yellow fever is similarly carried only by species of the genus Stegomyia, which has resulted in an entire change in the methods of controlling these diseases. Ver)^ much can be. 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882; Metcalf Collection (North Carolina State University). NCRS. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
