IOO DR. K. W. DAMMERMAN, ON A NEW SPECIES OF CALOTERMES. 



the bark and wood, whereby peculiar deformations are formed, 

 which are outwardly visible as swellings of the stem and are 

 recognised by the bursting of the bark. 



Later the passages are extended to the heart wood. So 

 the white ants do not enter the tree from the base, but on 

 the height where the swelling is found. 



Towards the end of the dry monsoon all stages were 

 found inside the stem, in the beginning of the rainy monsoon, 

 November and December, the winged forms swarmed, later 

 they were not found in the passages. 



How the trees are attacked in the beginning is still uncer- 

 tain, but in older passages pairs were found with shed wings 

 and also was found experimentally that the larvae are capable 

 of boring into the living wood. 



Probably the males and females are received in already 

 existing nests. 



The damage caused by this pest is of great importance. 

 On some places 75 °/ of the trees were infested. 



The trees break off easily near the swellings and the value 

 of the wood decreases considerably at the same time as it is 

 impossible to make good timber of the infested trees. 



