1919.] The Sixth Indian Science Congress. - exlv 
wind of reality play upon many of our cherished opinions and 
beliefs, and one of the beliefs that has wilted under the blast 
has been the belief that entomology, as generally practised and 
understood in England in the past, was competent to meet the 
practical demands of a big campaign. In the past three years 
T have had the privilege of being in charge of some of the entomo- 
logical research carried on by the War Office at home, in 
response to demands from various fronts, and my experiences 
during that time brought home to me, as nothing else could 
ave done, the extraordinary neglect of those departments of 
of physiology and psychology which must be the ultimate basis 
of oe and destructive measures against them 
Such measures, if they are to be scientific—in other words, 
if Hay are to be efficient and economical—must be based on 
knowledge. And that knowledge must be something that goes 
? 
future ° progress. 
the war that is coming, the war against insects, we 
must enlist these men in our ranks, and realize that no one 
department of science—and in particular no one department 
of zoology—can be, from the practical point of view, efficient if 
it tries to stand alone 
The stopeeon geographical distribution and iis 
significance of outrigger canoes.—By J. Hor 
Outrigger canoes co boats are divided into two main sal ouble 
and single outriggers. e latter are the more var aried, the main varia- 
Vi 
outrigge’ 
compound masts, high su rstructure such as the outrigger design per- 
rite, an ahi ate th two quarter n sigan rs, are depicted in numerous beautiful 
pane ies sed in the acquisition of the requi- 
site ship-building skill +d put together such great and complicated oe 
There is little doubt that before e Christian era the Javanese were expert 
ors. That the romee os to the Arab and the Indian 
is reasonably certain. Double th triggers have never been used in India so 
far as all evidence goes. This knowledge gives the key to the puzzle of 
how the ancestors of the Malagasy tribes of Mad ar arrived wave 
after wave in that island. In great ships of the Boro Budur type 
