. A manual for the study of insects. Insects. S70 THE STUDY OF INSECTS. wing-cover. Its larva bores in the wood of pine-trees. On one occasion the writer found many of them in a pine-tree eight inches in diameter, which they had bored through and through. When the larva is full grown it makes a hole nearly through the thick bark of the tree, so that it may easily push its way out after its transformations; it then retreats a short distance, and makes a little ring of chips around itself, between the bark and the wood, and changes to a pupa within this rude cocoon. The adult beetle remains in t
. A manual for the study of insects. Insects. S70 THE STUDY OF INSECTS. wing-cover. Its larva bores in the wood of pine-trees. On one occasion the writer found many of them in a pine-tree eight inches in diameter, which they had bored through and through. When the larva is full grown it makes a hole nearly through the thick bark of the tree, so that it may easily push its way out after its transformations; it then retreats a short distance, and makes a little ring of chips around itself, between the bark and the wood, and changes to a pupa within this rude cocoon. The adult beetle remains in this pupal cell through the winter. The Cloaked Knotty-horn, Desniocerits palliatiis (Des- moc'e-rus pal-li-a^tus).—This beautiful insect is of a dark- blue color, with greenish reflections. The basal part of the wing-covers is orange-yellow, giving the insect the appearance of having a yellow cape thrown over its shoulders (Fig. 693). The segments in the middle of the antennae are thickened at the outer end, so that they look like a series Fig. 693. of knots. Tlic adult is found quite common in June and July on elder, in the pith of which the larva bores. The Beautiful Maple-borer, Plaginotus speciosus (Plag-i- no'tus spe-ci-o^sus).—This is a very handsome insect, marked with black and yellow, as indicated in Fig- ure 694. It lays its eggs in midsummer on the trunks of sugar-maples, in the wood of which the larvae bore. If an infested tree be examined in the spring the pres- ence of these borers can be detected by the dust that falls from the burrows. The larvae can be destroyed at this time by the use of a knife and a stiff wire. The Locust-borer, Cylleiie robince (Cyl- le'ne ro-bin'i-ae).—To the enthusiastic en- fig. 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, 1849-193
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
