232 TOMICUS SP. 
should be chosen in suitable localities where they 
can be easily reached and watched. These trees 
should be felled, the bark being left on. The 
beetles will resort to them in large numbers 
for egg-laying, choosing them in preference to 
adjacent standing trees, When egg-laying has 
ceased, these trees should be barked. 
As we do not yet know exactly how many generations there 
are in the year at different elevations, I recommend that the 
system of “trap trees’? be kept up and watched carefully from 
the middle of April to November. ; 
7. As far as_ possible, apparently uninfested forests 
should be inspected for attacks of the pest (I have 
already discussed how such can be recognized). 
When badly infested trees are found, they should 
be treated as above. 
If the above methods are put in force, it should be possible 
to reduce the numbers and spread of the Blue Pine Tomicus and 
bring them down to the normal condition, in which state it may 
be left to be dealt with by various predaceous insects which feed 
upon it, several of which have been discovered and will be 
described in these notes.! 
In conclusion, I may mention that in the Chogaun forest in 
Bashahr, from which the attack was first reported in 1900 by 
Mr. Minniken, the latter informed me that he cut out in that year 
many of the badly infested trees and sent them down a rough 
timber slide to the Sutlej River, down which they were floated 
to the timber markets. Trees that can be so treated should be 
first barked or they will be liable to spread the pest, the time 
spent between felling and reaching the river being in all proba- 
bility quite sufficient for this purpose. The attack in this areae 
was again very bad in June 1g01 and had by no means been 
stamped out. : 


1 Since this note went to press, several fresh predaceous beetles, especially 
Histerid@ and Ichneumon and Bracon flies, have been discovered attacking 
this Tomicus or its larvae. It is hoped to treat of these in a future number 
of these notes, . . e 

