JOURNAL 



OF 



ECONOMIC ENTOMOLOGY 



OFFICIAL ORGAN AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS 



Vol. 3 APRIL, 1910 No. 2 



Proceedings of the T^venty-Second Annual Meet- 

 ing of the American Association of 

 Economic Entomologists 



(Continued from the Fehruarij issue) 

 Morning Session, Wednesday, December 29, 1909 



The meeting: was called to order by President Britton at 10.15 a. m. 



President Britton : The first paper to be presented is by Mr. E. 

 D. Sanderson, Durham, N. H., on "The Relation of Temperature to 

 the Growth of Insects." 



THE RELATION OF TEMPERATURE TO THE GROWTH 



OF INSECTS 



By E. DwiGHT Saxdersox. Ditrha)n, N. H. 



At the Chicago meeting of this association in 1907 the writer showed 

 (24a) that upon purely theoretical grounds there could be no uniform 

 accumulation of temperature or "thermal constant" for the various 

 stages of insect growth, but that the relation of temperature to growth 

 phenomena was probabl}^ different for each species and might be 

 expressed by a curve, the abscissas of which represent degrees of tem- 

 perature and the ordinates represent the time factor. The importance 

 of considering the so-called law of the velocity of chemical reaction as 

 influenced by temperature was pointed out and it was shown that the 

 velocity of reaction varies at different temperatvires. It was shown 

 that both the so-called thermal constant and coefficient of velocity 

 increase as the temperature is lowered from the optimum of the 



