Bulletin, Tema 7U.S. Government Printing Office, 1881 |
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Términos y frases comunes
abdomen abdominal segments Actias luna antennæ appearing August band bark bark-borer basal beetle blackish body borer Boring broad brown Brunswick Buprestid burrow caterpillar Cecidomyia CERAMBYCIDE Chamb chrysalis Clem cocoon color cylindrical Cynips dark dorsal dots edge eggs elytra family CERAMBYCIDE Feeding female Fitch flattened fore wings galleries galls gray green grub hairs Harris head HEMIPTERA hickory hind wings holes HYMENOPTERA inch long inner insect irregular joint July June larva larvæ leaf leaves Leconte legs length limb Lintner Lithocolletis locust longicorn male margin middle moth nearly numbers oblique Order COLEOPTERA Order HEMIPTERA Order LEPIDOPTERA outer oval Packard pair pale Phylloxera pitch pine prothorax punctures pupa reddish Riley rounded side slender species specimens spines spots spruce stripe surface suture thorax tibiæ transverse trees trunk tubercles twigs vein Walsh weevil white pine whitish wing-covers wood worm Xyleutes yellow yellowish
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Página 96 - ... the passage becomes clogged and the burrow more or less filled with the coarse and fibrous fragments of wood, to get rid of which the grubs are often obliged to open new holes through the bark. The seat of their operations is known by the oozing of the sap and the dropping of the sawdust from the holes. The bark around the part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumors, caused by the efforts of the trees to repair...
Página 218 - The females of these insects do not extrude their eggs. Clinging closely to the leaf with their heads towards its base, they die, their distended abdomens appearing like a little bag filled with eggs. The outer skin of the abdomen soon perishes and disappears, leaving the mass of eggs adhering to the side of the leaf, but completely covered over and protected by the closed wings of the dead fly.
Página 60 - Prussian blue in colour, bent, corrugated, with an interrupted ridge just outside the middle of each cover. They are covered with fine black hairs, bent over. There is a pair of parallel short honey-yellow lines in the middle of each wing-cover, with a third one a little in front, making in all six streaks. The legs and feet are black. It is a little over eight-tenths of an inch in length.
Página 186 - White pine weevil to select the leading shoot of this tree in which to deposit its eggs, when its young can be nourished equally well in the lateral shoots, where they would do little injury, or perhaps would be a direct benefit to the tree by cutting off the ends of the branches, and thus promoting the upward growth of the main trunk. The...
Página 32 - ... severed, until a high wind occurs. If the limb is not hereby broken, as soon as the weather becomes calm he very probably returns and gnaws off an additional portion of the wood, repeating this act again and again, it may be, until a wind comes which accomplishes the desired result. And this serves to explain to us why it is that the worm severs the limbs at such an early period of his life.
Página 186 - ... if they, our said grantees, or any of them their or any of their heirs or assigns, or any other person or persons by their or any of their privity, consent or procurement, shall fell, cut down, or otherwise destroy any of the pine trees by these presents reserved to us, our heirs and successors...
Página 182 - ... trees, has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of exuding pitch, which seems to act as a protection to both the larva and the chrysalis.
Página 164 - York, and of yellow pine (P. variabilia) in the States south of us. Whilst it is old and decaying or dead trees that most of the larger borers which we have described above attack, this small insect is liable to invade trees that are in full health and vigor, those that are young as well as old...
Página 218 - ... towards its base, they die, their distended abdomens appearing like a little bag filled with eggs. The outer skin of the abdomen soon perishes and disappears, leaving the mass of eggs adhering to the side of the leaf, but completely covered over and protected by the closed wings of the dead fly. I have met with the dead females thus adhering to the leaves the first of July, and have noticed the same insects on the leaves in full life and vigor the middle of May.
Página 32 - Having cut the limb asunder so far that he supposes it will break with the next wind which arises, the worm withdraws himself into his burrow, and that he may not be stunned and drop therefrom should the limb strike the earth with violence when it falls, he closes the opening behind him by inserting therein a wad formed of elastic fibers of wood.