. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. Fig. 7. O. materiarius. "Work in larcti —, wood surface; , egg-uiche; d., a tunnel ending blindlj' behind a. In this tunnel the fungus develops rapidly. Eggs and larvae have been removed from the niches. B.— Two eggs in position in the niches. The eggs are laid side by side in shallow niches along the side of the egg-tunnel, and packed in dust. The longer axis points away from the centre of the tree. Frequently the eggs are sunken irregularly into the bark of the tunnel roof and
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. Fig. 7. O. materiarius. "Work in larcti —, wood surface; , egg-uiche; d., a tunnel ending blindlj' behind a. In this tunnel the fungus develops rapidly. Eggs and larvae have been removed from the niches. B.— Two eggs in position in the niches. The eggs are laid side by side in shallow niches along the side of the egg-tunnel, and packed in dust. The longer axis points away from the centre of the tree. Frequently the eggs are sunken irregularly into the bark of the tunnel roof and packed in dust. The larval galleries are very irregular, usually destroying the bark. Both egg-tunnels and larval galleries are often entirely in the bark. There are two broods each season with us. By July 10th this season the egg-tunnels were about completed in the larch stumps, with the eggs practically all laid and many larvae working into the bark. By the first of August these larvae had matured in part and eggs were being laid in new tunnels from the sixth to the twentieth of that month. This insect prefers dying and dead bark of pine, spruce and larch, and works mostly at the base of the tree. It is not particularly injurious. A smaller, undescribed species of Dryocoetes was working with autographus, and has very similar habits. This completes the list of the true Bark-beetles found in those larches. There was also present another scolytid—Gnathotrichus materiarius—one of the Ambrosia. 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 Entomological Society of Ontario; Ontario. Dept. of Agriculture. Toronto, The Society
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsectp, bookyear1872
