JOURNAL 



OF 



ECONOMIC ENTOMOLOGY 



OFFICUL ORGAN AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS 



Vol. 15 JUNE, 1922 No. 3 



American Association of Economic Entomologists— Pro- 

 ceedings of the Thirty-Fourth Annual Meeting. 



( Continued) 



JOINT SESSION OF THE ENTOMOLOGICAL SOCIETY OF 



ONTARIO AND THE AMERICAN ASSOCIATION OF 



ECONOMIC ENTOMOLOGISTS 



Friday, December jo, ig2i, i.jo p. m. 



President Dean presided while four papers were being presented 

 and discussed that were left over from the program of the previous 

 afternoon. At the close of these papers, Mr. Arthur Gibson, Presi- 

 dent of the Entomological Society of Ontario, presided during the 

 rest of the session. 



President George A. Dean: The first paper is by P. A. Glenn. 



RELATION OF TEMPERATURE TO DEVELOPMENT OF THE 

 CODLING-MOTH 



By P. A. Glenn, Chief Inspector, Division oj Plant Industry, State Department of 



Agriculture, Urbana, Illinois 



The purpose of this paper is to give briefly some of the results of 

 a study recently made of the relation of climatic conditions to the 

 development of the codling-moth and especially to the time of ap- 

 pearance of the several broods of the moth. The study is based upon 

 data collected during a period of three years, 1915, 1916, 1917 at three 

 localities in Illinois. 



The piirpose of the study was to find some temperature unit so re- 

 lated to development that the sums of these imits which accumulate 



193 



