FAM I L Y CERAM B YC I DAE 



385 



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. 



Rekkkenxe. — Stebbing, Some Assam Sal Insect Pests, For. Bull. no. 11 (igo8). 



Habitat. — Goalpara, Assam, 



Tree Attacked.— Sal {Shorca rohitda). 



Larva.— Elongate, white, smoky-black at joints of segments. Head and mouth-parts 



black. I'rothorax 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), 



1 5 in. (See fig. 256, i). 



Flc. 256. — Ccravibyx ? sp. — i, larva : la, section of stem of a sal-pole showing the 

 larval gallery in sal-wood with two aeration galleries. 



The grub bores into the centre of the branch on w^iich the egg is laid, 



and tunnels down it till it reaches the main stem and 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 igo6. The insect is likely to 



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



attack is shown in fig. 256, la. 



9003 



B B 



