THE CODLING MOTH IN MICHIGAN. 



43 



Table XLIII. — Length of incubation of the first brood of eggs and average mean tempera- 

 ture during incubation, Douglas, Mich., 1911. 



No. of 

 obser- 

 vation. 



No. of 



eggs. 



Date— 



Depos 

 ited. 



May 28 

 May 30 

 June 1 

 June 4 

 June 3 

 June 5 

 Jane 6 

 June 8 

 June 9 



..do 



June 10 

 .do 



June 11 



..do 



June 12 



...do 



June 13 

 June 14 



..do 



June 15 



..do 



June 16 



..do 



June 18 

 June 19 

 June 20 



..do 



June 21 

 June 22 

 June 24 

 June 26 



..do 



June 27 

 June 28 

 June 29 

 July 2 



Red 

 ring. 



June 1 



June 3 



June 4 



June 7 



June 6 



June 8 



June 11 

 June 12 



...do 



June 13 

 ...do 



Black 

 spot. 



June 14 



...do 



June 15 

 ..do..... 

 June 16 

 June 18 



..do 



June 19 



..do 



June- 20 



..do 



June 21 

 June 22 



..do 



..do 



June 24 

 June 25 

 June 27 

 June 29 



..do 



Julv 1 

 July 2 



Julv ■ 4 



June 18 



...do 



June 19 



...do 



June 20 

 June 21 



...do 



...do 



...do 



June 22 



...do 



June 23 

 June 24 



..do 



June 25 

 June 26 

 June 27 

 June 30 

 July 1 



..do 



July 3 



..do 



July 4 

 July 5 



Hatched. 



June 5 

 June 8 



..do 



June 11 

 June 10 



June 15 

 June 16 

 ..do 



Duration of— 



Red 

 ring. 



Black 

 spot. 



June 



_ 



June 



9 



June 



10 



June 



12 



June 



11 



June 



13 



June 



15 



June 



17 



...do. 





June 



18 



June 



19 



June 



20 



..do 





June 



21 



..do. 





June 



22 



..do. 





..do. 





June 



23 



..do. 





June 



24 



June 



2a 



June 



24 



..do. 





June 



26 



June 



27 



June 



28 



June 



27 



June 



2s 



July 



1 



July 



2 



July 



3 



July 



4 



..do. 





July 







July 



6 



Days 

 4 

 4 

 3 



Incu- 

 ba- 

 tion. 



Average 



mean 

 temper- 

 ature. 



Days. 



Days, 

 10 



10 



10 



F.° 

 64.27 

 64.21 

 65.79 

 67.78 

 67.87 

 66.38 

 65.07 

 65.27 

 65.30 

 64.96 

 63.68 

 64.12 

 62.93 

 63.58 

 63.29 

 63.97 

 64.50 

 65.21 

 66.55 

 67.18 

 68.30 

 67.73 

 68.93 

 70.95 

 72.10 

 73.08 

 72.52 

 73. 67 

 73.42 

 69.15 

 70.07 

 71.61 

 72.51 

 73.16 

 76.96 

 82.80 



Table XLIV. — Incubation periods of first-brood eggs; summary of Table XLIII. 



Appearance of red 

 ring. 



Appearance of 

 black spot. 



Total incubation 

 period. 



Number 

 of days. 



Number 

 of obser- 

 vations. 



Number 

 of days. 



Number 

 of obser- 

 vations. 



Number 

 of days. 



Number 

 of obser- 

 vations. 



2 

 3 

 4 



3 

 21 



10 



3 



4 

 5 

 6 

 7 

 8 

 9 



1 

 1 

 8 

 6 

 13 

 1 

 1 



4 

 6 

 7 

 8 

 9 

 10 



1 

 

 6 



8 



10 

 5 



















35215°— Bull. 115, pt 1—12- 



