Indian forest insects of economic importance Coleoptera . o me at Dehra. During this period I also visited the trees onseveral occasions. Subsequent investigations undertaken between Mayand September enabled the full observations for the year round to becarried out. From these detailed investigations the life history of this important salbark beetle (see page 476) has been fully worked out, as also that of severalof its parasitic and predaceous foes. ON THE LIFE HISTORIES OF FOREST INSECTS 33 2. Life History of the buprestid Sphenoptera aterrima and the cerambycid Trinophyllum cribratuin. Gree
Indian forest insects of economic importance Coleoptera . o me at Dehra. During this period I also visited the trees onseveral occasions. Subsequent investigations undertaken between Mayand September enabled the full observations for the year round to becarried out. From these detailed investigations the life history of this important salbark beetle (see page 476) has been fully worked out, as also that of severalof its parasitic and predaceous foes. ON THE LIFE HISTORIES OF FOREST INSECTS 33 2. Life History of the buprestid Sphenoptera aterrima and the cerambycid Trinophyllum cribratuin. Green deodar-trees were felled under the orders of the DivisionalOfficer, Mr. V. Munro, at the end of May 1908, and watched throughoutthe year and up to June of the following year. The observations so madeand the specimens taken enabled the life histories of these two pests tobe definitely ascertained. It is now known that each takes a whole yearto pass throughone life - cycle(cf. p. 205 andp. 341), and thatthe beetles ma-ture and leave the trees at the \ I. end of May orin the first fort-night of June,and lay theireggs in newlyfelled freshsappy trees or instanding greensickly ones. The life his- |tory of an Ich-n e umo n fly,E phi elites, whichparasitizes thebuprestid grubhas also beenworked outthrough 111 t •year (see p. 207). The impor-tance of thus in-vestigating thelife histories ofall the principalbark- and wood-feeding pests ofthe more impor-tant trees cannotu i Fir,. IQ.—Egti and larval galleries t Spha • otrypes s be too strongly g^, ^.^ surfj> ,,, sil barkfshowmg the plan of the insisted upon. galleries. 9003 34 INDIAN FOREST INSECTS That the work is a comparatively simple one to put through willbe fairly obvious from the above descriptions of the methods necessary toundertake it. Many of the head-quarter houses of the Range Officers aresituated in the immediate vicinity of the forests under their charge. Byfelling a couple of trees somewhere close to the range h
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
