. Animal studies. ARTHROPODS. CLASS IXSECTS 135 thin and membranous wings incapable of being folded. These possess a network of delicate nervures, giving the general name nerve-winged insects'to these various small orders. Of the forms mentioned above, all but the white ants lay their eggs in the water, and the developing larvae. Fig. 77.—Dragon-fly (Libellula pulchetta). spend their lives in this medium until the time comes for their complete metamorphosis into the adult. The larvae of the caddis-flies protect themselves within a tube of stones or sticks bound together with silken threads, wh
. Animal studies. ARTHROPODS. CLASS IXSECTS 135 thin and membranous wings incapable of being folded. These possess a network of delicate nervures, giving the general name nerve-winged insects'to these various small orders. Of the forms mentioned above, all but the white ants lay their eggs in the water, and the developing larvae. Fig. 77.—Dragon-fly (Libellula pulchetta). spend their lives in this medium until the time comes for their complete metamorphosis into the adult. The larvae of the caddis-flies protect themselves within a tube of stones or sticks bound together with silken threads, which they usually attach to the under side of stones in running water. On the other hand, the young of the dragon- and may-flies, pro- vided with strong jaws, are active in the search of food and very voracious. In time they emerge from their larval skin and the water in which they live, and after a life spent on the wing they deposit their eggs and perish. The adult ant-lion, a type of the related order (Neuroptera), which has somewhat the appearance of a small dragon-fly, lays its eggs in light sandy soil. In this the resulting larvae exca- vate funnel-shaped pits, at the bottom of which they lie con-. 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 Jordan, David Starr, 1851-1931; Kellogg, Vernon L. [from old catalog].
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Keywords: ., bookauthorjordanda, bookcentury1900, bookdecade1900, bookyear1903
