THE GRAPE-BERRY MOTH. 



41 



there was a period of very low temperature from October 14 to 18, and 

 that this is correlated with an almost complete cessation of emergence 

 of the larvae. There is no doubt that the abnormally low tempera- 

 ture for this date prolonged the emergence period of the larvae for 

 the season of 1909. 



MISCELLANEOUS REARING RECORDS FOR THE SEASONS OF 1907 AND 



1908. 



The rearing records for the seasons of 1907 and 1908 are less exten- 

 sive and not so complete as those made a year later, but they agree in 

 general with the more complete records of 1909. Table XVI gives 

 the emergence record of 24 moths of the spring brood for the season 

 of 1907. 



Table XVI. — Time of emergence of moths of the grape-berry moth in the spring of 1907. 



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. 



June 21 

 22 

 23 

 24 



1 

 1 

 1 

 3 



June 25 

 26 



28 

 29 



4 

 3 

 3 

 1 



June 30 



July 2 



3 



4 



1 

 1 



1 

 1 



July 6 

 7 

 10 



1 

 1 



1 



No record of egg deposition by the spring brood of moths was 

 secured for the season of 1907, nor was a record made of the length 

 of the larval stage for the first brood. 



The complete record of two pupae of the first brood was secured dur- 

 ing 1907 which covered a period of 13 days for this stage, and a record 

 of one pupa in 1908 which covered a period of 12 days. These records 

 are shorter than the average length of this stage for a large number 

 of specimens observed in 1909 (see Table V, which shows a period of 

 15.2 days). 



An emergence record of 695 moths of the first brood was secured 

 during the season of 1907. (See Table XVII.) Unfortunately some 

 of the earliest maturing larvae had escaped from the infested fruit 

 before it was collected. Hence some of the earliest emerging moths 

 are not shown, since the first emergence in this record is dated 

 August 17. 



Table XVII. — Time of emergence of first-brood moths of the grape-berry moth, North East, 



Pa., 1907. 



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. 



Aug. 17 

 19 

 20 

 21 

 22 

 24 



56 

 5 

 29 

 70 

 34 

 57 



Aug. 26 

 27 

 28 

 29 

 30 

 31 



105 

 33 

 36 

 60 

 36 

 28 



Sept. 1 

 2 

 3 

 4 

 5 



22 

 13 



7 

 11 

 22 



Sept. 9 

 11 

 14 



Total . 



39 

 19 

 3 



695 





