DINODERUS MINUTUS, 359 

although not so offensively as to prevent their being made use 
of. The treatment lasted about 14 days, upon the expiration of 
which period the bamboos were at once sent to the workshops 
to be fitted. Mr. Williams had reported that within three weeks 
of this treatment some of the bamboos had been again attacked 
by the borers. As some 9,000 had been through the treatment, 
many of which had been already fitted, the case afforded a good 
opportunity for experiment. Having carefully examined all the 
bamboos and their method of treatment I was able, through the 
courtesy of the Superintendent, to obtain a number of specimens 
both untreated and in the various stages of treatment. With 
them it was my intention to initiate a series of experiments to 
determine the exact effect of any one or more of these preserv- 
ative liquids as a deterrent to the attacks of the beetles. The 
bamboos had been cut in the Garhwal Forests (United Provinces) 
and were obtained by the Telegraph Department at Najibabad, 
near Bareilly, having been floated down from the forests. They 
were, following the usual custom, passed through fire and 
straightened by the merchants before being sold. The telegraph 
specification required them to be 8 feet long or over, with a 
diameter at the small end of not less than 3ths inch and not more 
than 13th inch. It was known that the bamboos to be obtained 
were to be cut in the cold weather of 1902-03. Male bamboos 
(z.e., solid bamboos) only were to be sent. The bamboos were 
despatched in convenient lots from Bareilly and no special 
protection was given to them on the journey down. They arrived 
in Calcutta mostly in February and March, but some in April. 
They were not subjected to any treatment before the end of 
February, and consequently some of the bamboos were in the 
works for nearly a month before being operated upon. The 
bamboos had therefore either become infested on the way down 
or in Calcutta itself. When the treatment they were to be 
subjected to had been decided upon, no time was lost in putting 
them through it. It wasas the last of the bamboos were 
being put through the preservative treatment, that I visited the 
works, From previous observations I was of opinion that the 
beetles then appearing in the works were those of the 1st 
