Indian forest insects of economic importance Coleoptera . ed to the outside. Further, we have seen that a tree infested FAMILY CERAMBYGIDAE 3*5 in previous years is liable to be attacked again in a succeeding year. Soit would be well to remove those in which air-holes and fresh exit-holesare present. A study of the predaceous and parasitic insects which prey upon thelarva should also prove most useful. Cerambyx ? sp. REFERENCE.—Slabbing, Some Assam Sal Insect Pests, For. Bull. no. u (1908). Habitat.—Goalpara, Assam. Tree Attacked.—Sal (Shorea robusta). Larva.—Elongate, white, smoky-black at jo
Indian forest insects of economic importance Coleoptera . ed to the outside. Further, we have seen that a tree infested FAMILY CERAMBYGIDAE 3*5 in previous years is liable to be attacked again in a succeeding year. Soit would be well to remove those in which air-holes and fresh exit-holesare present. A study of the predaceous and parasitic insects which prey upon thelarva should also prove most useful. Cerambyx ? sp. REFERENCE.—Slabbing, Some Assam Sal Insect Pests, For. Bull. no. u (1908). Habitat.—Goalpara, Assam. Tree Attacked.—Sal (Shorea robusta). Larva.—Elongate, white, smoky-black at joints of segments. Head and mouth-partsblack. Prothorax swollen, prominent, hood-like, pointed anteriorly ; yellowish with two transverse orange lines dorsally, one anteriorly and the other pos- Description. teriorly. Segments following prothorax narrow and taper to a little behind the middle, and then increase in width to tenth, thence constricting. Three small pairs of feet on thoracic segments. Length (not full-grown),ii in. (See fig. 256, i).. li! Fir,. 256.—Cerambyx ? sp.— i, larva ; ia, section of stem of a sal-polo showing thelarva] gallery in sal-wood with two aeration galleries. The grub bores into the centre of the branch on which the egg is laid,and tunnels down it till it reaches the main stem ;tnd then proceeds down that. The method of operation of the grub is very Life History. similar to that of the sandal-wood longicorn described above. Immature grubs were taken in sal saplings and poles in Goalpara in April and May i<io6. The insect is likely toprove a pest in young sal plantations and coppice areas. The method ofattack is shown in lig. 256, i</. 9003 B i; CHAPTER XVII. RHYNCHOPHORA. TARSUS four-jointed on all legs, and densely pubescent. The head isprolonged into a beak which may be of considerable length. The groupincludes the families Anthribidae, Brenthidae, Curculionidae, Scolytidae,and Platypodidae. The last three contain a number of most
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
