62 
PINE. 
“ When the time for egg-laying comes the parent Beetles select 
these pieces of Pine, and by collecting them again (say in the month 
of June or sometimes earlier) you will have under the bark a great 
number of these destructive pests. 
“ This is a most practicable way, as it answers for plantations of 
all ages. As I stated before, I have found in old plantations (from 
60 to 100 years of age and over) that, when large branches decline 
and growth becomes languid, then these Beetles select them to 
lay their eggs in, as also in decaying standing trees. Again, no 
decaying trees should be allowed to lie, and thinnings should be 
cleared up as soon as possible.” 
Mr. Coupar noted in May, with regard to a large quantity of young 
Scots Pine, which had been cut down in the course of thinning, that 
at the time of writing the Pine Beetles were very busy indeed laying 
their eggs. These Pines had been cut down in the previous January, 
and the note confirms previous observation of these Beetles choosing, 
for egg-laying, trees which have been only lately felled, and which 
consequently have neither the full flow of sap of the living trees nor 
yet have laid long enough for the inner bark to be exhausted. 
Note .—For history and means of prevention of ravages of the Pine 
Beetle see the observations contributed by foresters given in previous 
Yearly Reports. 
Giant Sirex, “Timber Wasp.” Sir ex gigns, Linn. 
SlREX GIG-AS. 
Female Sirex , and larva. 
The splendid insect figured above is not usually credited with doing 
much mischief in England, but from my own observation I incline to 
think that this “ Timber Wasp,” as it is called in Germany, as well 
