. Insect enemies of the spruce in the Northeast : a popular account of results of special investigations, with recommendations for preventing losses . Work of Secondary and other Enemies of Spruce. 3506—No. 28—01- 65 PLATE of Polygraphus rufipennis showing different stages. a, b, e, Freshly excavated galleries in living bark,d. Old galleries in dead 11. 28, New Series, Div. of Entomology, U. S. Dept. of Agriculture. Plate IX. *-v mH \ I r *n*^i *„ > _ T. r

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1901