... 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 saw-dust from the holes. The bark around the part... The Canadian Entomologist - Página 1541879Vista completa - Acerca de este libro
| Thaddeus William Harris, Massachusetts. Zoological and Botanical Survey - 1841 - 484 páginas
...bark. The seat of their operations is known by the oozing of the sap and the dropping of the saw-dust from the holes. The bark around the part attacked...the trees to repair the injuries they have suffered. According to the observations of General HAS Dearborn, who has given an excellent account* of this... | |
| Cuthbert William Johnson - 1844 - 1210 páginas
...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...will become disfigured and weakened by large porous tumours, caused by the efforts of the trees to repair the injuries they have suffered. According to... | |
| 1846 - 392 páginas
...saw-dust from the holes. The bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfigured and weakened by large...trees to repair the injuries they have suffered." According to the observations of a writer in the " Massachusetts Agricultural Repository and Journal,"... | |
| 1846 - 390 páginas
...the bark. The seat of their operations is known by the oozing of the sap and dropping of the saw-dust from the holes. The bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfigured and weakened by large porous tumors, caused by the efforts of... | |
| Daniel Jay Browne - 1846 - 542 páginas
...the bark. The seat of their operations is known by the oozing of the sap and dropping of the saw-dust from the holes. The bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfigured and weakened by large, porous tumours, caused by the efforts... | |
| Thaddeus William Harris - 1852 - 536 páginas
...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...the trees to repair the injuries they have suffered. According to the observations of General HAS Dearborn, who has given an excellent account* of this... | |
| American Institute of the City of New York - 1853 - 550 páginas
...their operations is known by the oozing of the sap and the dropping of the saw dust from the hoh s The bark around the part attacked begins to swell,...the trees to repair the injuries they have suffered. According (o the observations of Gen. HAS Dearborn, who kas given an excellent account (in vol. 6,... | |
| Thaddeus William Harris - 1862 - 700 páginas
...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...the trees to repair the injuries they have suffered. According to the observations of General HA S. Dearborn, who has given an excellent account* of this... | |
| Cuthbert William Johnson - 1869 - 1296 páginas
...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...will become disfigured and weakened by large porous tumours, caused by the efforts of the trees to repair the injuries they have suffered. According to... | |
| 1878 - 798 páginas
...into the trunk, the general course of their winding and irregular passages THE CANADIAN ENTOMOLOGIST. being in an upward direction from their place of entrance....suffered. . . . The grubs attain their full size by the 20th of July, soon become pupae, and are changed into beetles and leave the trees early in September.... | |
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