92 



Date 



Direction of wind 





Velocity 



May 4, 



1911 



West 



13 



miles, maximum 



" 5, 



j > 



East and southeast 



12 miles, 



" 6, 



> j 



South 



12 



miles, 



" 7, 



) } 



South 



15 



miles, ' ' 



Sept. 25, 



" 



Variable 







" 26, 



" 



Northeast around to south 







" 27, 



; i 



South and southwest 







April 24, 



1912 



Southwest and west 



18 



miles, 



May 1, 



> ? 



South and southwest 



22 



} > 



} ) o 



} i 



Southeast and east 



21 



i ) 



" 3> 



> > 



Southeast and south 



14 



> ? 



" 4, 



> i 



South and southeast 



18 



J 5 



April 18, 



1913 



West and northwest 



18 



5 J 



" 21, 



,f 



South 



19 



" 



" 22, 



? ? 



South and southwest 



25 



" 



" 23, 



? } 



South 



31 



J 5 



" 16, 



1914 



West and southwest 



8 



3 } 



>> 16, 



» 



South and southwest 



11 



) ) 



» 18, 



> i 



South 



36 



» 



Sept. 20, 



} ) 



Southeast and south 



16 



> > 



" 21, 



> > 



South 



21 



: y 



It is a matter of common observation that the chinch-bug tends to 

 move with the wind, even when on the ground, and much more so, of 

 course, when on the wing. The wider and more rapid extension of 

 an outbreak to the north than in any other direction is a necessary 

 consequence; and the later stages of the spread of the present one 

 into the northernmost counties of its area seems, indeed, to have been 

 due mainly to this cause. Altho continuing much the most destructive 

 in the distinctively wheat- growing counties, it invaded counties to the 

 northward in which wheat was a relatively unimportant crop. In 

 1913, for example, it spread to the north over the greater part of the 

 counties of Christian and Sangamon, the cropping of which, as shown 

 below, gives us but 9.8 percent of their area in wheat in 1912 and 7.6 

 percent in 1913. Corn was, in fact, the predominating crop in these 

 counties, with the forage plants next in area and oats averaging only 

 about as much as wheat. 



Crop Areas, 1912 



Counties 



j Wheat 



Oats 



Corn 



Forage 



Christian 



..J 18,059 



5,846 

 29,196 



109,303 

 99,596 



74,915 

 41,581 



Sangamon 



. .. 21136 





Totals 



...1 39.195 



35,042 



208,899 



116,496 





Total of above crops 399,632 acres 



Total area 1,009,280 acres 



Total in cereal and forage crops 39.6 percent of area. 



Eatio of each crop to total of above crops: wheat, 9.8 percent; oats, 8.8 percent; 

 corn, 52.3 percent; forage, 29.1 percent. 



