CODLING MOTH IN SANTA CLAEA VALLEY. 



125 



Table XI. — Adult emergence of the first and spring brood* from hand material collected 



in 1909. 



Time during the day when moths (merged. — No tabulated record was 

 kept to show the time during the day when most of the moths 

 emerged, but observations showed that they issued in numbers 

 after 4 p. m. and supposedly during the night. Few emerged during 

 the period from morning after 9 o'clock until in the evening. The 

 emergence record was therefore usually taken each morning before 

 ',) a. m. and included moths of the evening and night before. This 

 seems at variance with the records obtained in 1011. 



Period of oviposition. — The first moths that appeared the Latter 

 part of March failed to oviposit since only a few individuals had 

 appeared until April 18. No difficulty was experienced in obtaining 

 eggs in confinement when a number of moths were placed in a cage at a 

 time. No eggs could be obtained from single pairs of spring-brood 

 moths as was possible later with those of the first brood and hence 

 no data was obtained as to the number of eggs a single female can 

 deposit. 



The first eggs were obtained April 20 or about from 3 to 4 days 

 after moths began to emerge in numbers. The period of low mean 

 temperature from April 26 to May 5 (see fig. 28) caused very few eggs 

 to be deposited, but by May 7 and from then on until the end of the 

 month large numbers were obtained. Oviposition in the field prob- 

 ably extended from April 10 to June 20 (about 10 days after the last 

 moth appeared), or a period of about 80 days, this giving a wide 



