. Insect enemies of the spruce in the Northeast : a popular account of results of special investigations, with recommendations for preventing losses . Dendroctonus piceaperda Hopk., n. sp. PLATE II I. Galleries and mines of the spruce-destroying beetle (Dendroctonuspiceap&rda Hopk. n. sp.) Primary and secondary galleries or mines of the spruce-destroying beetle, show-ing parts of six primary galleries—reduced about Bui. 28, New Series, Div. of Entomology, U. S. Dept. of Agricultur Plate Galleries and Mines of the Spruce-destroying Beetle.( Dendroctonus piceaperda, HopkA PLA
. Insect enemies of the spruce in the Northeast : a popular account of results of special investigations, with recommendations for preventing losses . Dendroctonus piceaperda Hopk., n. sp. PLATE II I. Galleries and mines of the spruce-destroying beetle (Dendroctonuspiceap&rda Hopk. n. sp.) Primary and secondary galleries or mines of the spruce-destroying beetle, show-ing parts of six primary galleries—reduced about Bui. 28, New Series, Div. of Entomology, U. S. Dept. of Agricultur Plate Galleries and Mines of the Spruce-destroying Beetle.( Dendroctonus piceaperda, HopkA PLATE and mines of Dendroeionns picea/perda in sprvce. Primary and secondary galleries or mines of the spruce-destroying Bui. 28, New Series, Div. of Entomology, U. S. Dept. of Agriculture. Plate IV.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1901
