38 



BULLETIN 932, U. S. DEPARTMENT OF AGRICULTURE. 



Table XXIV. — Length of the pupal stage of pupa; of the second brood of the 

 codling moth, Grand Junction, Colo., 1915. 



Date of 

 pupation. 



Num- 

 ber 

 of 

 indi- 

 vid- 

 uals. 



Length of the pupal stage in speci- 

 fied days. 



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 

 1 

 1 

 1 

 2 

 1 

 1 

 1 

 1 

 1 

 1 



1 

 1 















1 













1 













1 













1 



















1 















1 













1 















2 





















1 











1 















1 













1 





















1 













1 



















16 



2 



1 



2 



6 



1 



2 



1 



1 



Average length of pupal stage 15. 62 



Maximum length of pupal stage 31 



Minimum length of pupal stage 11 



Moths of the Second Brood. 



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

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



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

 Oram] Junction, Colo., 1915. 



XXV and figure 11. The first motli 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. 



