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. 



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 alter 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 twentv-fourth day after the time of emergence of the moths. 



