. Annual report. Entomological Society of Ontario; Insect pests; Insects. Fig. 41. Fig. 42. Fig. 43. , and is then across its neck where it is broadest. It tapers slightly from its neck backwards, the hind part of its body being nearly cylindrical. It is a soft or fleshy grub, somewhat shining and of a white color, often slightly tinged with yellow, its head which is small and retracted into the neck, being black in ; The earlier writers on this insect state that the parent beetle deposits an egg close to the axil of a leaf stock, or of a small twig near the extremity of a
. Annual report. Entomological Society of Ontario; Insect pests; Insects. Fig. 41. Fig. 42. Fig. 43. , and is then across its neck where it is broadest. It tapers slightly from its neck backwards, the hind part of its body being nearly cylindrical. It is a soft or fleshy grub, somewhat shining and of a white color, often slightly tinged with yellow, its head which is small and retracted into the neck, being black in ; The earlier writers on this insect state that the parent beetle deposits an egg close to the axil of a leaf stock, or of a small twig near the extremity of a branch, and that the grub tunnels its way downwards into the branch, when half grown gnawing away the wood so that it breaks off with the wind. Dr. Hamilton who has bred numbers of this species states that " The normal period of metamorphosis is three years, but in individuals it may be retarded to four or more years. How the larva got under the bark could not be ascertained. When first examined in April, they were from 4 to 5 m. m. long. They ate the wood under the bark, following its grain, and packed their burrows solidly with their dust. Their growth and progress were both slow, for by the next April they had scarcely more than doubled in length, and had not travelled more than from four to six inches during the year; but after July they developed an enormous appetite, and con- sumed the wood for at least one inch in length, and often entirely around the limb, -ejecting their castings through holes made in the bark. When full fed they bore obliquely an oval hole into the wood, penetrating it from four to ten inches. The larva then packs the opening with fine castings, and enlarges a couple of inches of the interior of the burrow by gnawing off its sides a quantity of coarse fibre, in which it lies after turning its head to the entrance (as shown in fig. 43). The time spent in the pupal state is indefinite, and does not seem to concern greatly the time of the appearance
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
