as an experiment of “White ants” (Termites). These experiments 
were necessarily limited by reason of the extraordinary difficulty 
in obtaining the chemical. Having been able to procure from In- 
dia a larger supply of the Bisulphide, I have considerably extended 
these experiments, with the result that I am still more fully con- 
vinced of the great value of this treatment. A definite area of the 
Gardens was marked out for experiment, and every ant’s nest 
within this area was treated, apparently with complete success. 
Bisulphide of Carbon gives off a very poisonous gas, which, being 
heavier than air, sinks to the bottom of the cavities and penetrates 
the subterranean galleries of the termites killing every insect with 
which it comes in contact. All tliat is necessary is to pour a small 
quantity of the liquid into the main shafts of the nests and dost* 
the apertures with earth. The inhabitants of the nest are killed in 
situ , and the mounds may be levelled and otherwise left untouched. 
The difficulty in obtaining the chemical is due to its highly inflam- 
mable nature, and results in the imported article being very costly. 
But, given a sufficient demand, it could be manufactured locally, as 
it now is in India, and sold at a rate which would allow of its being 
extensively employed. — Ceylon Administration Report , igo2. 
[Carbon bisulphide has long been known and largely used for 
dealing with underground pests, and is one of the “ secrets ’’ used 
by game-keepers at home for making rabbits leave their burrows 
and lie out. It has not been recommended in the Bulletin pre- 
viously for termites on account of its being almost impossible to get 
it in sufficient quantity in the Straits and from its very dangerous 
nature. From the recklessness of the coolies in handling dan- 
gerously inflammable substances, it is hardly safe to allow them the 
use of it.] 
COTTON LEAF-ROLLER. 
The cotton leaf-rolling caterpillar which has been so troublesome 
in the Egyptian cotton grown in the Botanic Gardens, Singapore, 
and has been described in Bulletin 111 , p. 1 6 1 , has been identified 
by Mr. C. O. Waterhouse of the British Museum as Syllapta 
derogata , Fabr, one of the Pyralidse and an insect of very wide 
distribution. — Editor . 
MISCELLANEOUS. 
Notices to Subscribers. 
I. For the information of subscribers and others who have been 
unable to complete their series of the Agricultural Bulletin of the 
Straits and Federated Malay States notice is here given that Nos, 
i ,*7, 8, 9, of the Old Series (1891-1900) and Nos. 1, 8, 9, 10, of the 
Ne'v Series Vol. 1 (1901-1902), the first issues of which have long 
h , exhausted, are now being reprinted, with plates, and will 
rtly be ready. 
