Forest entomology . e rough, and rounded over the sides, so that a transverse section of the abdomen would be nearly circular. The elytra should be carefully noted, and Dr Somerville gives the following detailed description :— The elytra are lustrous, slightly pubescent, and traversed longi-tudinally by rows of fine punctures. The interspaces between thepunctated rows are somewhat wrinkled, and each contains a row ofhairy tubercles. These tubercles, in the case of the second interspaceson either side of the middle suture, are only present as far as thepoint where the elytra begin to bend downw
Forest entomology . e rough, and rounded over the sides, so that a transverse section of the abdomen would be nearly circular. The elytra should be carefully noted, and Dr Somerville gives the following detailed description :— The elytra are lustrous, slightly pubescent, and traversed longi-tudinally by rows of fine punctures. The interspaces between thepunctated rows are somewhat wrinkled, and each contains a row ofhairy tubercles. These tubercles, in the case of the second interspaceson either side of the middle suture, are only present as far as thepoint where the elytra begin to bend downwards towards the apex;whereas in the other interspaces they are continued down the apicaldeclivity to the edge of the elytra. This peculiarity is most markedin the male, though in both sexes it is quite observable with theunaided eye when the insect is held in a good light with its backtowards the observer—that is to say, when the apical declivity isexamined obliquely. Owing to the want of hairy tubercles in the. COLEOPTERA—SCOLYTlDyE. Ill two interspaces mentioned, these are seen to be smooth and lustrous,and appear like shining lines or shallow grooves on the apical point is of much importance, for it is only by means of it thatwe can with certainty distinguish this insect from Hylesinus larva is a white footless grub, with a light canary-coloured middle portion of the grub is yellow, and the tail portion purewhite. The pupa is whitish and shining, showing all the parts of theperfect insect. Preventive and Remedial Measures. Though this is certainly a very destructive insect, yet, in theabsence of special damage by gales, it can be held in check by fairlygood forest management. This consists largely in destroying thebreeding-places, which, it must be remembered, are either in the stemof cut trees or in sickly standing trees. Much, of course, will dependon the felling season, and on the interval elapsing before manufactur-ing. If, say,
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