. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. 122 INSECT LIFE. Observe their food habits. These beetles are sup- posed to live chiefly upon decaying vegetation in the water, but some of them have been known to feed upon other insects and upon snails. Arrange your pinned specimens under a copy of the following label and immediately after the Dyti- scidas:— Family HYDROPHiLiDiE (Hyd-ro-phil'i-dse). The Water-scavenger Beetles. The members of this family form cases in which the eggs are laid.
. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. 122 INSECT LIFE. Observe their food habits. These beetles are sup- posed to live chiefly upon decaying vegetation in the water, but some of them have been known to feed upon other insects and upon snails. Arrange your pinned specimens under a copy of the following label and immediately after the Dyti- scidas:— Family HYDROPHiLiDiE (Hyd-ro-phil'i-dse). The Water-scavenger Beetles. The members of this family form cases in which the eggs are laid. Fig. loo represents one of these cases attached to a leaf. If you find similar cases preserve them in your col- lection with the beetles of this family, or place them in an aquarium and try to rear the young. The Larv^ of Water-scavenger Beetles (Field and School Work).—The Fig ioo larvag of the water - scavenger beetles live beneath the surface in ponds inhabi- ted by the adults, and may be captured by a sweep- ing net in the same way as the adults. As they thrive well in aquaria, their habits can be easily observed. They bear some resemblance to water-tigers (Fig. 97), but they can be distinguished from them by the following characters: the body is more plump; the mandibles are not so slender, are not tubular, and are usually furnished with one or more teeth; and the abdomen, in all the species that I have studied, is furnished with backward-projecting spines or with filaments, or with both. Study the habits of these larvae. Observe th^. 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 Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomol, bookyear1901
