486 
the gaseous mixture, A rough diagiam is included in 
Appendix A. Failing carbon bisulphide, solid calcium car- 
bide may be used ; . , , 
(c) That whenever a tree falls from the attacks of while 
ants, it should be split op.en, the earthy matter within 
removed and well mixed with lime the stump dug out ar d 
burnt together with the trunk. I he hole should be filled n 
with earth and lime and ground changkoled within <• jadiu, 
of 20 feet. This should be done immediately on the tall ot 
the tree and especial promptitude is indicated if the event 
happens at all near the swarming season , 
(d) That the larger mound-buildmg species be not mtei- 
fered with, as in this country they largely take the p ace of 
earth worms in more temperate climates, and play an 
important part in the economy of nature by rapidly con- 
verting dead timber and decaying vegetable matter into a 
form immediately available for plant nutrition ; 
(«) That the possibility and even probability of mismanaged 
and neglected estates becoming a breeding ground for 
T. rest™ and hence a source of danger and expense to their 
neighbours, be seriously considered by the Planters Associa- 
tion. 
XVIII. — Conclusion. 
In conclusion, I must express my acknowledgments for the 
great assistance rendered to me by the planting community in 
general and to Mr. P. W. Parkinson, of Sungei Rengam Estate, 
fn particular, to whom I am indebted for much material at d and 
many valuable suggestions, which are embodied m the present 
report. 
HERBERT C 
ROBINSON, 
Curator. 
Selangor State Museum, 
Kuala Lumpur, 13th October , 1904. 
APPENDIX A. 
Manufacture and use of Carbon Bisulphide. 
Theoretically, too lbs. of sulphur should yield iig lbs. of carbon 
bisulphide, but after allowing for leakage and kiss from imperfect 
* Not printed: . ,, 
