THE CODLING MOTH IN MICHIGAN. 



51 



numerous, while during the first half of August they were again 

 very abundant, reaching a maximum August 7. During the remain- 

 ing part of the emergence period, which extended to September 18, 

 comparatively few moths appeared. 



Table LI. — Oviposition of moths of the summer brood in captivity, Douglas, Mich., 1911. 





Num- 



Date of— 



Days— 















Num- 



ber 













From 



ber 



of 













time of 



of 



moths 



Emer- 



First 



Last 



Before 



Of 



emer- 



cage. 



per 



gence of 



ovipo- 



ovipo- 



ovipo- 



ovipo- 



gence to 





cage. 



moths. 



sition. 



sition. 



sition. 



sition. 



last ovi- 

 posi- 

 tion. 



1 



29- 



July 10 



July 14 



July 20 



4 



7 



10 



2 



24 



July 11 



...do 



July 24 



3 



11 



13 



3 



10 



July 12 



...do 



Aug. 1 



2 



19 



20 



4 



29 



July 13 



July 16 



July 27 



3 



12 



14 



5 



20 



July 14 



July 23 



July 24 



9 



2 



10 



6 



15 



July 15 



July 18 



July 26 



3 



9 



11 



7 



10 



July 1G 



July 20 



July 28 



4 



9 



12 



8 



14 



July 20 



July 20 



July 31 



6 



6 



11 



9 



15 



July 21 



July 28 



Aug. 5 



7 



9 



15 



10 



1G 



July 22 



...do 



July 30 



6 



3 



8 



11 



15 



July 23 



...do 



Aug. 4 



5 



8 



12 



12 



13 



July 25 



July 27 



...do 



2 



9 



10 



13 



25 



July 26 



July 31 



Aug. 1 



5 



2 



6 



14 



11 



July 27 



...do.. .. 



Aug. 2 



4 



3 



6 



15 



14 



July 28 



Aug. 1 



Aug. 7 



4 



7 



10 



10 



17 



July 29 



July 31 



Aug. 14 



2 



15 



16 



17 



18 



July 30 



Aug. 1 



Aug. 10 



2 



10 



11 



18 



36 



July 31 



Aug. 2 



Aug. 18 



2 



17 



18 



19 



37 



Aug. 1 



Aug. 6 



Aug. 7 



5 



2 



G 



20 



15 



Aug. 2 



Aug. 5 



Aug. 9 



3 



5 



7 



21 



38 



Aug. 3 



Aug. 6 



Aug. 15 



3 



10 



12 



22 



34 



Aug. 4 



...do 



Aug. 1G 



2 



11 



12 



23 



54 



Aug. 5 



Aug. 7 



Aug. 12 



2 



6 



7 



24 



35 



Aug. 6 



Aug. 8 



Aug. 13 



2 



6 



7 



25 



88 



Aug. 7 



Aug. 9 



Aug. 16 



2 



8 



9 



26 



55 



Aug. 9 



Aug. 11 



Aug. 17 



2 



7 



8 



27 



54 



Aug. 10 



Aug. 12 



Aug. 31 



2 



20 



21 



28 



27 



Aug. 12 



Aug. 13 



Aug. 23 



1 



11 



11 



29 



19 



Aug. 13 



Aug. 17 



Aug. 21 



4 



5 



8 



30 



47 



Aug. 14 



Aug. 16 



Aug. 25 



2 



10 



11 



31 



21 



Aug. 16 



Aug. 18 



Aug. 28 



2 



11 



12 



32 



16 



Aug. 17 



...do 



Sept. 3 



1 



17 



17 



33 



27 



Aug. 18 



Aug. 21 



Aug. 28 



3 



8 



10 



34 



23 



Aug. 21 



Aug. 22 



Sept. 14 



1 



24 



24 



35 



Avera 

 Maxin 

 Minim 



15 



Aug. 22 



Aug. 25 



Sept. 3 



3 



10 



12 



ge 





3.2 



9.4 



11.6 



ram 



um 







9 

 1 



24 

 2 



24 



6 











Time of oviposition. — Observations on egg deposition by the sum- 

 mer moths in captivity were made under conditions already described 

 on page 14 for the spring brood. The results as presented in Table 

 LI show that on an average the first eggs were laid 3 days after the 

 time of emergence of the moths and that oviposition extended on an 

 average to 9.4 days. Within the various cages considerable variation 

 will be noted; in one instance the first eggs were obtained the following 

 day after the emergence, in another instance the ninth day; in one 

 cage the last eggs were deposited the sixth day, and in another cage 

 the twenty-fourth day after the time of emergence of the moths. 



