338 SIREX ? SP. 
does not usually require bark to lay her eggs in, but drills a hole 
in the wood itself and oviposits. These habitsrender this 
pest to be feared and make the working out of its life-history 
imperative, since it is capable of committing damage to the 
sandal-wood after it has been cut and barked, when no further 
damage is to be feared from the longicorn borers described on 
Pp. 379 and 383. 
We require to know how long it spends in the larval stage. 
feeding on the wood, how long in the pupa and adult or fly stage, 
and when the insect makes its appearance in this latter stage 
(the adult will probably be a fly not unlike the one shown in 
Pl. VII, fig. 1 e of No. 2 of these notes). Also whether it attacks 
the trees while they are still quite green or only after the wood 
has already begun to dry. 
When we have answered some of the above questions, 
more especially the last, we shall be in a position to state what 
remedies it will be possible to undertake against the pest. 
