12 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES, 



SECOND-BROOD LARVAE. 



Period of hatching. — According to records of oviposition, the first 

 larvae of the second brood would have hatched June 18. They began 

 hatching in numbers in the cages June 21. Reared larvae entering 

 fruit as late as August 3 were undoubtedly of the second brood, as 

 they pupated on reaching full growth. Some of the brood probably 

 hatched later still, making a total period of entrance to the fruit of 

 perhaps 55 days for such larvae of this brood as pupated. 



Maturing oflarvx. — The band record (p. 24) indicates that second- 

 brood larvae began to leave the fruit by July 15. The first of the 

 reared larvae left July 13, and were from eggs laid 4 days later than 

 the earliest, so mature second-brood larvae may have appeared by 

 July 10. The band records of both 1907 (p. 23) and 1908 (p. 24) 

 indicate that the last of the second brood left the fruit early in Sep- 

 tember. 



Period in fruit. — A large number of second-brood larvae hatching 

 during the night of June 22 were transferred to bagged fruit June 25. 

 Seventeen of these reached maturity after an average time in the fruit 

 of 24.6 days, the time ranging from 21 to 31 days. The individual 

 records are given in Table XI. 



Table XI. 



-Life of second-brood larvae, reared in bagged fruit on trees (eggs recorded in 

 Table X). 



Number 



When 



Date of 

 leaving 

 fruit. 



Time in 



of larvae. 



hatched. 



fruit. 





Night. 





Days. 



1 



June 22 



July 13 



21 



4 



...do 



July 14 



22 



1 



...do 



July 15 



23 



4 



...do 



July 16 



24 



1 



...do 



July 17 



25 



2 



...do 



July 18 



26 



2 



...do 



July 19 



27 



1 



...do 



July 20 



28 



1 



...do 



July 23 



31 



Several of the same lot of larvae were put on picked fruit and kept 

 in jars out of doors. Most of these spun cocoons in the fruit, and had 

 pupated before the fact was noticed. Three of them, however, left 

 the fruit after periods of 21 and 22 days. The fact that these larvae 

 had been kept in jars instead of on bagged fruit seems to have 

 hastened development, as the average time from oviposition to emer- 

 gence of adult of 11 individuals of this lot was 42.3 days, as against 

 49.5 days for the 17 individuals on bagged fruit. Nine second-brood 

 larvae hatching July 28 to August 3 were reared in picked fruit in jars, 

 and reached maturity in from 16 to 20 days, the average being 17.7 

 days. Individual records of this lot are given in Table XII. 



