. Fresh-water biology. Freshwater biology. AQUATIC INSECTS 915 the largest single complex of aquatic Diptera. They are a host; indeed, the typical genus Chironomus is a host in itself. Their larvae (Fig. 1384), with no better apparatus than a few blood gills at the end of the abdomen, and their pupae, with nothing better than "tube gills" protruded from the prothoracic spiracles, are Fig. 1384. The larva of Chironomus, {After Johannsen.) able to live in all waters, from springs to stagnant pools and from rills to deep lake bottoms. They are chiefly herbivorous and are of very great i
. Fresh-water biology. Freshwater biology. AQUATIC INSECTS 915 the largest single complex of aquatic Diptera. They are a host; indeed, the typical genus Chironomus is a host in itself. Their larvae (Fig. 1384), with no better apparatus than a few blood gills at the end of the abdomen, and their pupae, with nothing better than "tube gills" protruded from the prothoracic spiracles, are Fig. 1384. The larva of Chironomus, {After Johannsen.) able to live in all waters, from springs to stagnant pools and from rills to deep lake bottoms. They are chiefly herbivorous and are of very great importance in furnishing the food of a multitude of the larger animals, including fishes. The larvae construct for. Fig. 1385. Dwelling-tubes of midge larvae {Chironomus) from the lake bottom. (Photograph by T. L. Hankinson.) themselves some sort of shelter, fastening the materials their envi- ronment oiifers together with the silk-like secretion of their salivary glands; some in rapid streams build cases on the stones; others, on the lake bottom, build soft flocculent tubes of silt (Fig. 1385).. 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 Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
