. Animal forms; a second book of zoology. Zoology. ARTHROPODS. CLASS INSECTS 119 possess four thin and membranous wings incapable of being folded. These possess a network of delicate nervures, giv- ing the name Xeuroptera (meaning nerve-winged) to the class. Of the forms mentioned above, all but the white ants lay their eggs in the water, and the developing larvae. Fig. 71.—Dragon-fly (Libellula pulchella). 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 bo
. Animal forms; a second book of zoology. Zoology. ARTHROPODS. CLASS INSECTS 119 possess four thin and membranous wings incapable of being folded. These possess a network of delicate nervures, giv- ing the name Xeuroptera (meaning nerve-winged) to the class. Of the forms mentioned above, all but the white ants lay their eggs in the water, and the developing larvae. Fig. 71.—Dragon-fly (Libellula pulchella). 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, which has somewhat the appearance of a small dragon-fly, lays its eggs in light sandy soil. In this the resulting larvae excavate funnel-shaped pits, at the bottom of which they lie concealed. Insects stumbling into their 9. 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; Heath, Harold, 1868- [from old catalog] joint author. New York, D. Appleton and company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
