Indian forest insects of economic importance Coleoptera . FIG. 351.— Hewetti,?,\.zb. i,larva ; 2, 2 a, female ; 2 />, 2 c, male beetle ;2d, enlarged antenna; 2 c, leg. North-West Himal lya. less at right angles to the long axisof the tree (pi. lii), in this differingfrom other Indian Scolytidae,*in which the gallery bored by the female is parallel to the long axis of theAs she eats out this tunnel, the female makes little indentationsin the edges on both sides and places an egg in each. When shehas completed the gallery, which is the egg-gallery, when she haslaid all her eg
Indian forest insects of economic importance Coleoptera . FIG. 351.— Hewetti,?,\.zb. i,larva ; 2, 2 a, female ; 2 />, 2 c, male beetle ;2d, enlarged antenna; 2 c, leg. North-West Himal lya. less at right angles to the long axisof the tree (pi. lii), in this differingfrom other Indian Scolytidae,*in which the gallery bored by the female is parallel to the long axis of theAs she eats out this tunnel, the female makes little indentationsin the edges on both sides and places an egg in each. When shehas completed the gallery, which is the egg-gallery, when she haslaid all her eggs, she dies in situ at the head of the gallery. Beforethe gallery is completed, however, the larvae from the first-laid eggs Scolytus major, Polygraphus major, Sphaerotrypes siwalikensis, etc. - • : with i PLATE LI I. • ; -. Iryocoetes /u-:,.<•///, Stch., in On<.tt* incana. Pairing-chambers :ind c^;^ -allcrics in the outersapwood. (Government House, Naini Tal, Himalaya, May 1908. FAMILY SCOLYTIDAE 547 commence to hatch out. The larva eats out a narrow tunnel in adirection at right angles from the egg-gallery, and this larval galleryappears to be invariably straight. This may be due to the hard straightfibres of the oak wood ; but, whatever the cause, this habit of the grubdistinguishes it at once from other known Indian scolytid bark-boringgrubs, whose tunnels invariably serpentine; also, owing to the fact that theegg-galleries are at right angles to the long axis of the tree, go round thetree, the larval galleries go straight up and down the tree. The plan thusmade is so different from any of the at present known Indian Scolytidaeas to render the presence of this insect in the trees easily recognizable. The larval galleries increase in diameter with the growth of the grub,but do
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
