Some insects injurious to forests . Pig The western pine-destroying barkbeetle (Dendroctonusbrevicomis): a , adnlt female; b, c, d, details of punctuation; e,adult male. Natural size at left (original). Bu 53 Bureau of Entomology, U. S Dept of I PLATE II. Work of the Western Pine-destroying Barkbeetle in from Killed Tree; also Faint Marks on Surfaceof Wood. (Original. I Bui. 58, Bure. E ?gy U. S. De - -jre. PLATE III.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1910