20 
TERETRIOSOMA INTRUSUM, 
MARSEUL. 
The characters of this Jee¢/e are very similar to the above 
mentioned two species, and for the purpose of these notes the 
insect will be sufficiently recognised from the above descrip- 
tions and figure. 
3 Life history. ; 
The above three species of Zeretrtosoma are predaceous 
insects and were found together in numbers in the galleries bored 
by the Szzoxy/on beetles, and more especially amongst their 
larve on which they feed. It has yet to be observed whether 
they also attack and devour the Sznoxy/lon beetles in their 
mature state. These useful insects are at present only known 
in their imago stage, their larval forms and the manner in 
which they feed being as yet undiscovered. 
Areas from which reported. 
All the three species were found by the writer in the galler- 
ies made by the Sznoxylon beetles in the Shahdera and Changa 
Manga Plantations of the Lahore division in the Punjab. 
Relations to the Forest. 
Owing to their predaceous habits these insects are of the 
greatest importance in the forest, as their operations tend to 
keep down the numbers of two bad timber-boring beetles. 
Protection. 
As these beetles are found in the same positions as the 
Sinoxylon beetles, my recommendations for exterminating these 
latter will result in destroying large numbers of their pre- 
daceous enemies. It is evident, however, that at Changa Manga 
exceptionally favourable conditions have resulted in such* an 
enormous increase of the boring beetles that their Teretriosoma 
enemies are no longer able to cope with the numbers and keep 
them in check, as, under normal conditions, they would probably 
be able todo. It has become necessary therefore for the for- 
ester to step in and my recommendations for the necessary 
reatment have already been described. 
