. The elements of forestry : designed to afford information concerning the planting and care of forest trees for ornament or profit and giving suggestions upon the creation and care of woodlands with the view of securing the greatest benefit for the longest time, particularly adapted to the wants and conditions of the United States. Forests and forestry. Insect Ravages in Woodlands. 163 •1 J tend to limit these injuries. One of these is a carnivorous beetle, that hatches out at about the same time. Although they have wings, they attack them on the ground, and mount upon the trees to seize thei
. The elements of forestry : designed to afford information concerning the planting and care of forest trees for ornament or profit and giving suggestions upon the creation and care of woodlands with the view of securing the greatest benefit for the longest time, particularly adapted to the wants and conditions of the United States. Forests and forestry. Insect Ravages in Woodlands. 163 •1 J tend to limit these injuries. One of these is a carnivorous beetle, that hatches out at about the same time. Although they have wings, they attack them on the ground, and mount upon the trees to seize their prey. 654. Usually beetles of the general form shown in the foregoing engraving, with long sharp jaws and very rapid movements, belong to the carnivorous class. Something may be done to prevent the injuries of the worms above described, by scraping off the eggs from the bark. They are always deposited on the out- side trees of a forest, and never within it. 665. Of bark-boring insects the conifers have an unusually large share, there being, perhaps, no species that is entirely free from their rav- ages. They are sometimes very symmetrical in their work, the bark, externally, showing a row of holes at equal intervals, and, between the wood and bark, burrows running sometimes horizontally, at other times vertically or ob- liquely, with numerous branching burrows that seldom or never run into one another, however nearly they may approach. 656. The main stem of these burrows is made by the parent-insect, who, as she ad- vances, deposits her eggs on the sides. From these the larvae hatch, and, because small, the passage which they make is at first narrow. It widens as they grow in size, and at the end may expand into a little chamber. When the worm, has finished this stage of its growth, it becomes a pupa, and finally eats out into the open air, as a perfect insect. Its natural size is shown by the side of the above engraving. 657. The immense numbers in which these insects appe
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectforestsandforestry
