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allude to the swarms visiting eastern Nebraska and the western half 
of Iowa. 
It has further been clearly ascertained that their migrations in a 
single season may, and occasionally do, extend not only 700 miles, 
but as much as 1,000 miles; and so far as their powers of flight and 
endurance of the fatigue of migration, is concerned, there appears to 
be no reason why, with favorable winds and weather, they could not 
reach even the Atlantic coast. I once held a similar view to that 
advocated by Mr. Walsh, but a somewhat thorough investigation of 
locust flights has served to convince me of my error in this respect. 
There can be little doubt that swarms have traveled in a single sea¬ 
son from the confines of British America to Texas. So far then as 
the distance is concerned Mr. Walsh was evidently in error; yet so 
far as his conclusion is concerned there does appear to be some law 
that limits their migrations toward the east. But the possibility of 
their crossing the Mississippi does not depend as he thought upon 
the elevation of a mountain range east of the Rocky Mountains, 
but upon a change in climatic conditions. Let Iowa and Minnesota 
become as dry and barren as the plains west of them and the locusts 
will be as certain to pour down upon the fields and prairies of Illi¬ 
nois as effect follows cause. If the thousands of little lakes in the 
western and southern part of Minnesota should be dried up or drain¬ 
ed, then will this arid condition be brought about. With the pres¬ 
ent climatic conditions Illinois’ fields and meadows will never become 
a prey to these migrating hordes, to the meteorologist must the ques¬ 
tion therefore be referred for solution. 
