340 



Table VII. Showing the actual and calculated time from pupation to emergence 



of moths of the first generation at Olney, Illinois, 191'>, tiased on 



the original records of P. A. Glenn. 



.Srt 



E5 



Q 



ll 



"J^K 



4/13 

 4/16 

 4/16 

 4/16 

 4/17 

 4/17 

 4/17 

 4/19 

 4/19 

 4/19 

 4/20 

 4/20 

 4/20 

 4/21 

 4/21 

 4/22 

 4/22 

 4/23 



5/3 



5/2 



5/3 



5/6 



5/3 



5/6 



5/7 



5/6 



6/8 



5/14 



5/10 



5/12 



5/13 



5/11 



5/12 



5/12 



5/13 



5/12 



M. 



M. 



5/3 

 5/4 

 5/4 

 5/4 

 5/6 P. M 

 5/6 P. M 

 5/6 P. M, 

 5/8 P. M 

 5/8 P. M, 

 5/8 P.M. 

 5/10 M. 

 5/10 M. 

 5/10 M, 

 5/11 P. M, 

 5/11 P. M. 

 5/12 P. M, 

 5/12 P. M, 

 5/13 P. M. 



273.6 

 243.4 

 258.7 

 285.5 

 247.4 

 274.1 

 285.8 

 255.2 

 274.2 

 350.0 

 270.0 

 193.9 

 311.6 

 264.7 

 278.3 

 265.6 

 2SS.5 

 249.4 



275.8 

 2.',9.1 

 265.7 

 279.2 

 i62.l, 

 S69.J 

 275.0 

 255.8 

 285.9 

 354.2 

 272.4 

 210.0 

 28.3.0 

 270.0 

 283.2 

 270.0 



261 

 232 

 247 

 268 

 237 

 258 

 269 

 240 

 257 

 328 

 257 

 278 

 295 

 250 

 263 

 251 

 268 

 235 



Mean (30 individuals) 



271.8 19.3 



5/13 P. M. 

 5/13 P. M. 

 5/14 P, M. 

 5/14 P. M. 

 5/14 P. M. 

 5/14 P. M. 

 5/15 A, M. 

 5/15 A. M. 

 5/16 A. M. 

 5/16 A. M. 



?67.( 

 290.1 

 246.: 

 :'69,; 

 292,: 

 316.: 

 272.' 

 296,! 



Mean (30 individuals) 



Column 4 gives the date on which the developmental total reached 6480 (equiv- 

 alent to 270 substitution-quotient), on a basis of velocity values shown in Table I, 

 assuming that pupation occurred at noon of the day recorded. Column 5 gives the 

 total which was reached on the actual date of emergence, reduced to the same 

 basis. Column 6 gives the mean number of developmental units per day, reckoned 

 from velocity values in Table I, for the actual period of pupal life as recorded. Col- 

 umn 7 gives the theoretical time, in view of the recorded conditions of temperature 

 and humidity, calculated by dividing the mean daily velocity into 6480 as the normal 

 developmental total. This eliminates individual variation. The substitution totfls 

 shown In the last column were obtained by the temperature-substitution method ex- 

 plained on p. 393 ; interpolations are shown in italics. 



