Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1903 Excerpt: ... A further note on the life history of SCOLYTUS MAJOR, MS. Plate XI. References:-Provisionally named Scolytus major, MS. Scolytus sp. See No. I of these Notes, pp. 45--48, and PI. IV, fig. 4, a, b, c. Tree attacked i--Cedrus Deodara (Deodar). This beetle infests trees of all ages from the largest to quite young saplings. In these latter it is to be found near the base of the stem. It is therefore always found in company with the smaller Scolytus, Scolytus minor, MS., being only absent in the tops of young saplings. In poles and saplings, when possible, it enters the tree beneath a branch as described below in the case of its smaller companion. Failing branches, it chooses some flake of bark or inequality on the stem and burrows beneath it. It is generally the more numerous of the two beetles. The number of developing eggs is between 6o and 7o. At times the number may be more or less. The first eggs laid by the beetle hatch out before it has finished the egg gallery, the time passed in the egg stage being probably from 4 to 7 days. The egg is spherical in shape, yellow in colour and shining. It is wrapped up in what appears to be filamentous wood shavings. The larva, on first hatching out, is a minute little white dot. The curved shape is, however, easily recognizable by the time it has bored about J inch away from the egg gallery. The larval life of the first generation is about 4 weeks from leaving the egg to pupation. Pupation takes place partly in the wood and partly in the bark except in the case of the smaller saplings, when it may occasionally take place entirely in the wood, the larva boring into the sapwood at or near the end of its gallery. The larva pupates about the last week in June. Plate XI shows a complete plan of the galleries made by this in...
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