246 
day-degrees for the larva and the variations therefrom that we have a 
the present time, and with similar data for the egg and pupa they will © 
serve as a fairly satisfactory basis for forecasting events in the seasonal - 
history of the codling-moth. : 
RELATION OF TEMPERATURE TO DEVELOPMENT OF THE PUPA. 
Observations were made on a total of 4348 pupz of the codling- | 
moth. The data were tabulated, grouped, and averaged in the same 
manner a those for the other stages. A summary of the results is given _ 
in Table 7. 
