9 



ESTIMATE or LOSS I.V CHINCH BUGS, 



Summer Of \m . 



[Please indicate by underlining the proper words in columns below.] 



TO SMALL GRAIN. 



TO GRASS. 



TO CORN. 



1 . None 

 3. Little 



3. Moderate 



4. Considerable 

 B. Great 



6. Very Great 



7. Nearly Complete 



8. Complete 



1. None 



2. Little 



3. Moderate 



4. Considerable 



5. Great 



6. Very Great 



7. Nearly Complete 



8. Complete 



1. None. 



2. Little. 



3. Moderate. 



4. Considerable. 



5. Great. 



6. Very Great. 



7. Nearly Complete. 



8. Complete. 



Was injury greater in neighborhoods where wheat or barley was grown than elseAvhere? 



Signature: 



County: 



Town : 



Eight hundred and sixty -two assessors reported by the return of 

 these cards marked so as to indicate their judgment of the amount 

 of chinch-bug injury in their respective townships. 



STUDY OF DATA. 



In studying the data thus collected, the State was first divided 

 into six seciions; each section to be studied separately from all 

 points of view. Later, the two northern sections were thrown 

 together, and also the three middle ones, the data being thus sum- 

 marized separately for the three principal regions, Northern, Central 

 and Southern Illinois; and finally the State was studied as a 

 whole, without reference to geographical divisions. For each of 

 these areas the postal card township reports were distributed in 

 groups according to the amount of damage done to each of the 

 principal farm crops, — first to small grain, next to grass, and 

 finally to corn. For example, all the cards showing no injury to 

 corn were brought together in one group, all those showing a 

 "little" injury to the crop in another, all reporting "moderate" 

 damage in a third, and so on, until all the cards received were 

 divided into eight lots, corresponding to the eight degrees of in- 

 jury to corn distinguished. Then, lists being made of the town- 

 ships belonging to each group as thus classified, the acreage in 

 wheat for each township was taken from the tables of acreage 

 already mentioned, and an average struck for each group corre- 

 sponding to each grade of chinch-bug injury. These averages- 

 being set down in the progressive order of increasing loss by 

 chinch bugs from "none" to complete devastation, it was at once 

 apparent whether any connection between the wheat area and the 

 insect damage was to be made out, the list of numbers showing 

 the wheat acreage being, on the whole, an increasing series if 

 such connection existed, and otherwise not. 



