e2 JOURNAL OF ECONONIC ENTOMOLOGY [Vol. 15 



field meetings, and I believe there are great possibilities in large co- 

 operative efforts to impress the public with the value of entomological 

 activities. 



Other points might be discussed, but Professor Dean presented them 

 very clearly. Our members should take them all to heart and put as 

 many of them as possible into practice. 



Vice-President Arthur Gibson: If there is no further discussion, 

 I will say in behalf of the Canadian entomologists that we appreciate 

 very much indeed the address of President Dean, particularly as it 

 relates to the subject of cooperation. At the corn borer conference 

 recently held at Sandusky, Ohio, a large nimiber of entomologists from 

 the United States and Canada met and straightened out many diffi- 

 culties. This is only one example of what can be accomplished by 

 cooperation. 



President Dean resumes the chair. 



President George A. Dean: The next paper is by C. H. Hadley. 



OUTLINE AND PROGRESS OF WORK BEING CONDUCTED 



AGAINST THE JAPANESE BEETLE, POPILLIA 



JAPONICA Newm.i 



By C. H. Hadley, Riverton, N. J. 



For several years, appropriations have been made annually by 

 Congress and the States of New Jersey and Pennsylvania for the purpose 

 of at first, exterminating the Japanese beetle, and later, when extermina- 

 tion seemed impossible within reasonable expenditures of funds, for 

 limiting the spread of the insect. 



The general scheme of organization of the work was outlined in a 

 paper presented _by the writer at the annual meeting of this Association 

 a year ago,^ and the plan of work has been followed during the past 

 year substantially as suggested at that time, with some modifications. 



Spread 



The spread of the insect during the season of 1921 has apparently 

 been considerable. The area infested at the close of the season of 1920 

 was approximately 103 square miles, of which 92 square miles were in 

 New Jersey and the remaining 11 square miles in Pennsylvania. At 

 the close of the season of 1921, the infestation covered approximately 

 213 square miles in New Jersey and approximately 57 square miles in 



(1) Published by permission of the Secretaries of Agriculture of the U. S. Dept 

 of Agriculture and New Jersey Department of Agriculture. 



(2) Hadley, C. H., Jour, of Econ. Ent. Vol. 14 ( 1921) No. 3, pp. 249—253. 



