 ... the approach of winter, during which they remain at rest in a torpid state. In the spring they bore through the sapwood, more or less deeply into the trunk, the general course of their winding and irregular passages, being in an upward direction from...  American Agriculturist - Page 3451846Full view - About this book
 | United States Entomological Commission - 1890 - 1078 pages
...In the spring they bore through the sap-wood more or less deeply into the trunk, the general conrse of their winding and irregular passages being in an...of their holes as fast as they are made, but after a while the passage becomes clogged and the bnrrow more or less filled with the coarse aud fibrous... | |
 | United States Entomological Commission, Alpheus Spring Packard - 1890 - 1060 pages
...winter, during which they remaiu at rest in a torpid state. In the spring they bore through the sap-wood more or less deeply into the trunk, the general course of their winding and irregular passages beiug in an upward direction, from the place of their entrance. For a time they cast their chips out... | |
 | 1891 - 754 pages
...during which they remain at rest in a torpid condition. In the spring they bore through the sap wood more or less deeply into the trunk, the general course of their winding irregular passages being in an upward direc tiou from the place of their entrance. For a time they... | |
 | Pennsylvania. Department of Agriculture - 1897 - 886 pages
...during which time they remain at rest in a torpid state. In the spring they bore through the sap-wood more or less deeply into the trunk, the general course of their windings and irregular passages being in an upward direction from the place of their entrance. The... | |
 | Pennsylvania. Department of Forests and Waters - 1898 - 346 pages
...winter, during which they remain at rest in a torpid state. In the spring they bore through the sap-wood more or less deeply into the trunk, the general course...entrance. For a time they cast their chips out of the holes as fast as they are made, but after a«while the passage becomes clogged and the burrow more... | |
 | Pennsylvania. Department of Agriculture - 1898 - 348 pages
...entrance. For a time they cast their chips out of the holes as fast as they are made, but after a while the passage becomes clogged and the burrow more or...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... | |
 | 1906 - 936 pages
...winter, during which they remain at rest in a torpid state. In the spring they bore through the sapwood, more or less deeply into the trunk, the general course...of their holes as fast as they are made, but after a while the passage becomes clogged and the burrow more or less filled with the coarse and fibrous... | |
 | Minnesota. State Entomologist - 1908 - 220 pages
...winter, during which they remain at rest in a torpid state. In the spring they bore through the sapwood, more or less deeply into the trunk, the general course...of their holes as fast as they are made, but after a while the passage becomes clogged and the burrow more or less filled with the coarse and fibrous... | |
 | 1908 - 596 pages
...winter, during which they remain at rest in a torpid state. In the spring they bore through the sapwood, more or less deeply into the trunk, the general course...of their holes as fast as they are made, but after a while the passage becomes clogged and the burrow more or less filled with the coarse and fibrous... | |
 | University of Minnesota. Agricultural Experiment Station - 1909 - 474 pages
...winter, during which they remain at rest in a torpid state. In the spring they bore through the sapwood, more or less deeply into the trunk, the general course...of their holes as fast as they are made, but after a while the passage becomes clogged and the burrow more or less filled with the coarse and fibrous... | |
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