. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. Fig. 226.—The wes- Fig. 227.—Larva of Dendrodonus monlicolce. tern pine borer {Dendroc- {After Swaine, Bui. 14, Eni. Bur. Can.) tonus monticoloe. {After Swaine, Bui. 14, Ent. Bur. Can.) 7. D. piceaperda Hopk., Eastern spruces. 8. D. pseudotsugce Hopk., The Douglas fir and western larch. 9. D. simplex Lee, Larch (Eastern). 10. D. valens Lee, Pinus and Picea. 11. Dryoccstes confusus Sw., Alpine fir of British Columbia and Alberta. 12. Polygraphiis rujipennis Ky., Spruces throughout Canad
. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. Fig. 226.—The wes- Fig. 227.—Larva of Dendrodonus monlicolce. tern pine borer {Dendroc- {After Swaine, Bui. 14, Eni. Bur. Can.) tonus monticoloe. {After Swaine, Bui. 14, Ent. Bur. Can.) 7. D. piceaperda Hopk., Eastern spruces. 8. D. pseudotsugce Hopk., The Douglas fir and western larch. 9. D. simplex Lee, Larch (Eastern). 10. D. valens Lee, Pinus and Picea. 11. Dryoccstes confusus Sw., Alpine fir of British Columbia and Alberta. 12. Polygraphiis rujipennis Ky., Spruces throughout Canada. 13. Pityokteines sparsus Lee, Balsam fir in the east. The bark-beetles are small (1-9 mm. long), brownish or black, and usually cylindrical beetles. One group, the Ambrosia bark-beetles make their tunnels in the wood whose walls are stained black by the growth of the fungus Ambrosia which nourish them. The other group—the true bark-beetles—make their tunnels in the bark or between the bark and the 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 Lochhead, William, 1864- [from old catalog]. Philadelphia, P. Blakiston's son & co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
