38 



BULLETIN 932. U. S. DEPARTMENT OF AGRICULTURE. 



Table XXIV. — Length of the pupal stage of pupw of the second brood of the 

 codling moth, Grand Junction. Colo., 1915. 



Date of 

 pupation. 



Num- 

 ber 

 of 

 indi- 

 vid- 

 uals. 



Length 



ofthepu 

 tied 



pal stage in speci- 

 iays. 



11 



12 



13 



14 



16 19 21 31 



Aug. 12 

 14 

 15 

 17 

 19 

 22 

 23 

 25 

 27 

 28 

 29 

 30 



Sept. 9 

 13 

 14 



1 



! 



1 

 1 

 1 

 1 

 l 

 2 



1 

 1 

 1 

 1 

 1 

 1 



1 

 1 

















.... 



.... 

 .... 



1 

 .... 



2 

 .... 



1 .... ... .... 













........ I .... 



1 









1 











1 











1 



16 



2 



1 



2 



6 



1 ; 2 1 1 



Average length, of pupal stage . . . 

 Maximum length, of pupal stage . 

 Minimum length of pupal stage . 



Days. 

 . 15.62 

 . 31 

 . 11 



Moths of the Second Bbood. 



Time of emergence. — The time of emergence of moths of the sec- 

 ond brood reared from insectary-bred material is presented in Table 



3&>TEnBER 



Fig. 11. — Time of emergence of moths of the second brood of the codling moth. 

 Grand Junction, Colo., 1915. 



XXV and figure 11. The first moth of this brood issued August 23, 

 the last October 14: thus the emergence extended over a period of 

 more than one and a half months. 



