Indian forest insects of economic importance Coleoptera . tosearching out the bark-boring beetles I think the histerid also enters theegg-galleries for the purpose of laying its eggs close to those of the Sphaero-trypes. The pink grub is, however, very active, and does not appear toconfine itself to any one set of larval galleries, since it is often found betweenthe bast and sapwood worming its way on to neighbouring galleries remotefrom the one where it hatched out. The eggs of the Xiponins do not hatchas soon as, or at the same time as, those of the bark-borer, since no younglarvae were pres
Indian forest insects of economic importance Coleoptera . tosearching out the bark-boring beetles I think the histerid also enters theegg-galleries for the purpose of laying its eggs close to those of the Sphaero-trypes. The pink grub is, however, very active, and does not appear toconfine itself to any one set of larval galleries, since it is often found betweenthe bast and sapwood worming its way on to neighbouring galleries remotefrom the one where it hatched out. The eggs of the Xiponins do not hatchas soon as, or at the same time as, those of the bark-borer, since no younglarvae were present in any of the egg-galleries and short larval galleries foundso numerously in the latter half of May. The abundance of this insect is byno means yet satisfactorily settled. In the three localities I have found itin it has only been sparingly taken. This may. however, be easily accountedfor by the fact that it is only to be found in the larval galleries of itshost, from which it has to be laboriously cut out. I have rarely taken 486 FAMILY SCOLYTIDAE. it on the bark of the tree. It apparently hides until it can safely enter atunnel already extending down to the bast layer. This insect is of such importance that the remainder of its life historyurgently requires working out. We require to know whether the number ofgenerations it passes through coincide with those of the Sphaerotrypes, andthe exact number of them. The larval and pupal stages and beetle stagesof the first generation of the year, March to May, would appear to coincidewith those of the insect it preys upon, and it is not unlikely that theremaining life cycles of the year will be found to do so. Tillioera assamensis, Stebbing, sp. nov. (p. 187). The beetle feeds on themature forms of the Sphaerotrypes and also of Platypuscnrtus (p. 624), and on species of Diapus (p. 630). Beetle.—Squarish, with an ant-like vertical head and shoul-ders to the elytra, which give it some superficial resemblance to alongicorn beetle.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
