Part III.] 
I 
Beeson : Bcchole Borer of Teak. 
Directeur Y/h Boschproefstation in his note on the pest in 
Java, “ Be groote djati-boorder ( oleng-oleng ), Duomitus ceramicus, 
Wlh .” (Meded. V/h proefstation voor het Boschwezen, 4, 1919), who has 
kindly permitted the reproduction of one of the plates illustrating 
the note. C. F. C. B.] 
2. With a view to obtaining the opinions of the large number of 
experts who are employed by the important timber firms in Burma, 
the managers were asked to collect and forward any information of 
value that had been or could be collected. The information obtained 
has been summarised below and the writer gratefully acknowledges 
his indebtedness to the following firms : Messrs The Bombay Burma 
Trading Corporation, Ltd., Messrs Steel Brothers & Co., Ltd., Messrs 
T. D. Findlay & Co., Ltd., and Messrs Foucar & Co., Ltd. 
3. The word “ bee-hole ” appears to have been employed by 
Europeans from the earliest times of which there is any record, and 
means a hole of moderate size made by any boring insect. It does not 
include teredo borings nor holes made by small beetles in the sapwood. 
[On the specific identity of insects causing beeholes in teak and their 
differentiation, see p. 49. C. F. C. B.] 
4. The number of bee-holes that may be found in a log varies very 
much. As many as 88 bee-holes have been recorded in one log, and 
this number has almost certainly been exceeded. [Logs examined by 
the Forest Zoologist in a Rangoon saw mill revealed from 100-400 
beeholes on the exposed faces of the planks and beams ; analyses of 
whole trees indicate that a total of several hundred beeholes per 
tree is not infrequent. C. F. C. B.j 
A square which without bee-holes would be called Europe quality 
may be relegated by their presence to inferior Indian Grade. One 
firm reports as follows :—“ The logs which show bee-holes or even one 
bee-hole on the butted end, generally open up very bee-holey, and I 
judge that these bee-holes are made chiefly during the earlier part of 
the life of the tree, for where a log shows bee-holes, after the first slab has 
been cut off it, it is almost invariably the case that the next cut will 
open up a much larger number of bee-holes, so that one might make 
the broad statement that in 9 cases out of 10, bee-holing increases the 
nearer one gets to the heart of the tree.” Bee-holes in the middle of a 
log, plank, or board are more harmful than at the ends or edges, and 
the position and number of these blemishes are very carefully examined 
when a log is on the saw-mill benches. 
5. Taking a general average for the Province, it is probable that 
the value of the Annual Outturn of teak is lessened by 10 to 15 per cent, 
by the fact that the bee-hole borer attacks the teak tree. During the 
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