Indian forest insects of economic importance Coleoptera . ready to leave thetree, it bites out a circular hole at one end of the cocoon (fig. xxxvii, thelower of the two cocoons shown), and, crawling out of this, bores a largecircular hole through the thick bark of the tree, and thus escapes from holes have a considerable diameter, and are easily visible even inthe thick bark which this tree puts on (vide pi. xxxvii). Observations ofattacked trees have shown that the newly mature weevils do not alwaysget out of the tree in safety, owing to the outflow of resin which at timescatches th
Indian forest insects of economic importance Coleoptera . ready to leave thetree, it bites out a circular hole at one end of the cocoon (fig. xxxvii, thelower of the two cocoons shown), and, crawling out of this, bores a largecircular hole through the thick bark of the tree, and thus escapes from holes have a considerable diameter, and are easily visible even inthe thick bark which this tree puts on (vide pi. xxxvii). Observations ofattacked trees have shown that the newly mature weevils do not alwaysget out of the tree in safety, owing to the outflow of resin which at timescatches the beetles whilst engaged in boring their way through the bark anddrowns them. Instances of this have been observed in situ in the trees. It is difficult at present to state with any certainty the number ofgenerations which this weevil passes through in the year, since the insect isso often found in the tree in all three of its stages of larva, pupa, and am inclined to consider, however, that the insect has normally three genera- Il ATE Portion of the stem of a voim- /inns longifolia showing the attacks of the larvae otCryptorhvncliits hrainihi, in the bast and sapwood. Two cocoons are shown in situand exit-holes of the matured weevils in the bark, [aunsar. .\ortli-\Vcst FAMILY CURCULIOXIDAE 431 tions in the year, but that these generations overlap very greatly, thus givingrise to the appearance of there being an almost continuous succession oflarvae and pupae in the trees throughout the year. An examination ofinfested trees at the commencement of the winter (about the middle ofNovember) will show that almost mature and immature beetles are presentin the pupal cradles, and that these pass through the winter in this larvae in the trees which have not as yet pupated will probably allpupate before the severe cold commences, so that the winter is probablychiefly passed in the pupal or mature-beetle condition. We have no dataat presen
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
