. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 1 :â ' -U. Fig. 56.âWork of the Black Hills beetle in the Black Hills National Forest: A, Small freshly at- tacked fine tree, showing pitch tubes. B, Marks of primary galleries on surface of wood when bark is removed. C, Freshly attacked tree, showing pitch tubes; near tree not attacked. D, Dead tree, showing where outer bark has been removed by woodpeckers. (Author's illus- tration.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 1 :â ' -U. Fig. 56.âWork of the Black Hills beetle in the Black Hills National Forest: A, Small freshly at- tacked fine tree, showing pitch tubes. B, Marks of primary galleries on surface of wood when bark is removed. C, Freshly attacked tree, showing pitch tubes; near tree not attacked. D, Dead tree, showing where outer bark has been removed by woodpeckers. (Author's illus- tration.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P. O.
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectentomology
