Part III.] Beeson: BeeKole Borer of Teak. 93 
20 per cent, were recorded as attacked, and in all 58 beeholes of 1916 
emergence or of previous years, were plugged and marked with paint. 
Six trees were felled and split (2 dominant, 3 dominated and 1 suppressed) 
and 3 of them were found to contain beeholes. The distribution of 
the attack by quality class of tree was found to be as follows :— 
Dominant, 14 out of 110 = 13 per cent, q 
Dominated, 21 „ 84 — 25 per cent. >-== 48 out of 243 or 20 per cent. 
Suppressed, 13 „ 49 = 26 per cent. J 
The plot was again examined between the 8th and 11th June 1916, 
and the number of fresh larval attacks was recorded. 122 trees (50 
per cent.) were found to show signs of attack, the relative incidence in 
the quality classes being as under :— 
Dominant, 59 out of 110 = 54 per cent. J 
Dominated, 46 „ 84 = 55 per cent. = 122 out of 243 or 50 per cent.' 
Suppressed, 17 „ 45 = 35 per cent. J 
In an area within the plantation adjacent to the sample plot, 
enumeration were made in May 1916 and the following data on the 
distribution of the attack were obtained :— 
Dominant, 40 out of 181 = 22 per cent. J 
Dominated, 26 „ 102 = 25 per cent. S*= 102 out of 395 or 26 per cent. 
Suppressed, 36 „ 112 = 32 per cent. J 
It will be noticed that in suppressed trees, while the percentage of 
fresh larval attack is lowest, the percentage of visible beeholes is highest. 
The latter condition is due to the fact that the slower occlusion of 
beeholes in suppressed trees allows a relatively larger number of holes 
to remain visible, than in dominant and vigorous trees where the rate 
of healing is quicker, 
Life History Observations. —In March 1916, emergence had already 
occurred in 4 per cent of the trees in the sample plot; empty pupal 
skins were observed on the 3rd and 4th May ; fresh larval work was 
encountered between the 8th and 11th June. Larvae were also found 
by Mr. P. Burnside, Extra Assistant Conservator of Forests, on the 
29th and 30th May and 2nd June 1917. 
1918. The area was again enumerated (F. Z.) in May 1918, and a 
close scrutiny of the whole bole up to the crown branches was made on 
each tree. Thirteen trees only, or 5*4 per cent, showed emergences of 
1918 at heights of 1-20 feet above ground ; the attacked trees were 
distributed irregularly over the plot, and of the total number only 2 
[S. T. 98 and 173] had been recorded as showing attack in 1916. 
The results of the analyses of trees felled at the time of enumeration 
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