JOURNAL OF ECONOMIC ENTOMOLOGY 
OFFICIAL ORGAN AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS 
JUNE, 1923 
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The air as a medium of dispersion deserves more than a passing 
thought. Insects are well known inhabitants of the air and it has long 
been known that apterous spiders make long voyages with no more 
stable support than a gossamer web. Later investigations have shown 
that small caterpillars may literally drift upon the “wings of the wind” 
and in the case of young caterpillars of the gipsy moth this is known to 
be a most important method of spread. It is evident that the lower 
wind currents are very important aids to the spread of insects and yet 
relatively little is known concerning them. The part winds play in the 
spread of insects has a very material bearing upon the proposed barrier 
zone which may be established in New York State to prevent the west¬ 
ward trend of the gipsy moth. A series of temporary weather stations 
have been established in western Massachusetts and Connecticut and a 
few in adjacent portions of eastern New York for the purpose of securing 
data on the direction and velocity of the winds at the time young 
gipsy moth caterpillars are likely to be carried and in addition toy balloons 
are being liberated on definite schedules from a series of stations for the 
purpose of supplementing the data obtained from the weather stations. 
This extension of earlier work of federal men and in co-operation with 
them bids fair to yield some most interesting results. 
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