FAMILY CERAMBYGIDAE 



3*5 



in previous years is liable to be attacked again in a succeeding year. So 

 it would be well to remove those in which air-holes and fresh exit-holes 

 are present. 



A study of the predaceous and parasitic insects which prey upon the 

 larva 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-parts 

 black. 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 the 

 larva] 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 to 

 prove a pest in young sal plantations and coppice areas. The method of 

 attack is shown in lig. 256, i</. 



9003 



B i; 



