The two-lined chestnut borer

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 work of demolition. The death of the chestnut trees was laid to the account of the little buprestid borer, Agrilus bilineatus, which forms the subject of this circular, and the destruction of the coniferous trees was, in like manner, accredited to the scolytid bark-beetle, Dendroctonus frontalis Linn

Powder-post injury to seasoned wood products

The so-called powder-post injury to seasoned wood has attracted much attention in America, and especially in Europe for centuries, and has been the subject of published articles in many languages. This peculiar injury seems to be on the increase in the United States and numerous requests from a number of the principal manufacturers of vehicles and wooden articles have recently been addressed to this office for information. The subject has received considerable attention through Mr. F. H. Chittenden and the writer in the past, and investigations are now being made with a view to publishing a special .bulletin giving detailed information. It is deemed advisable, however, to issue this circular in advance, as it is addressed especially to our correspondents who are in need of immediate information

Insect life /

v. 3 1890-9

Insect life /

v. 2 1889-9

Insect life /

v. 6 1893-9