THE GRAPE-BERRY MOTH. 



35 



moths of the two broods in the field. Table VI contains a record 

 of the emergence of 403 moths, and a glance at the table will show that 

 the maximum number of these first-brood moths emerged from 

 August 14 to August 29. The rate of emergence is graphically 

 shown by the curve in figure 1 1 . 



Table VI. — Time of emergence of moths of the first brood (summer moths) of the grape- 

 berry moth at North East, Pa., in 1909. 



Date of 

 emer- 

 gence. 



Num- 

 ber of 

 moths. 



Date of 

 emer- 

 gence. 



Num- 

 ber of 

 moths. 



Date of 

 emer- 

 gence. 



Num- 

 ber of 

 moths. 



Date of 

 emer- 

 gence. 



Num- 

 ber of 

 moths. 



July 31 

 Aug. 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 



1 



1 



5 







9 



7 



18 



28 



24 



18 



10 



Aug. 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 



34 

 32 



1 

 17 



7 

 19 

 23 

 27 

 23 

 27 

 18 



Aug. 30 

 31 

 Sept. 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



5 

 13 

 4 

 9 

 7 

 4 

 

 4 

 2 

 1 

 1 



Sept. 10 

 11 

 12 

 13 

 14 

 15 



1 

 

 1 

 3 

 

 



Total . . 



403 



Oviposition of first-orood moths. — The oviposition records of only a 

 few moths of the first brood were secured and are not numerous 

 enough to give an adequate idea of the length of this period. The 



31 2 4 b 8 10 12 14. \b 



August 



20 22 24 2b 26 30 l 3 5 7 q ll 13 



September 





Fig. 11. —Diagram showing time of emergence of the first-brood moths of the grape-berry moth in 1909, at 



North East, Pa. (Original.) 



same difficulty in getting the moths to oviposit freely in confinement 

 was encountered as with the spring-emerging moths. Table VII 

 gives the oviposition of a few individuals of the first brood. 



