Recent years have witnessed extensive destruction of forest growth,
particularly of pine, spruce, and chestnut, in portions of the United
States east of the Rocky Mountains. This injury has been very
generally attributed to insects, and there is evidence that certain
wood and bark-boring species have largely contributed to the...
The Bureau of Entomology has been conducting systematic and economic
investigations of the weevils infesting the bark of the trunk and
terminal shoots of conifers in the United States, the results of which will be
published in the regular technical and popular bulletins ; but since these can not be...