52 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



On correlating the above observations with the time of emergence 

 of the moths it will be found that the oviposition period extended 

 from about July 11 to September 25. However, very few eggs were 

 laid during September, and not all of these hatched. The great 

 majority of eggs were deposited during August. 



Table LII. — Length of life of male and female moths of the first brood; summary of 

 records of 1,019 individual moths. 



Male. 



Female. 



Male. 



Female. 



Length 



Number 



Length 



Number 



Length 



Number 



Length 



Number 



of life. 



of moths. 



of life. 



of moths. 



of life. 



of moths. 



of life. 



of moths. 



Days. 





Days. 





Days. 





Days. 





1 



1 



1 



1 



18 



6 



18 



10 



2 



8 



2 



5 



19 



2 



19 



9 



3 



16 



3 



6 



20 



5 



20 



10 



4 



22 



4 



15 



21 



2 



21 



13 







22 



5 



24 



22 



1 



22 



9 



6 



42 



6 



32 



23 



2 



23 



2 



7 



46 



7 



27 



25 



1 



24 



2 



8 



48 



8 



62 



26 



1 



26 



4 



9 



50 



9 



46 



32 



1 



28 



1 



10 

 11 

 12 

 13 



41 

 30 

 32 



18 



10 

 11 

 12 

 13 



53 



48 

 43 

 40 







29 

 30 

 32 

 33 



2 

 1 

 1 



1 















14 

 15 

 16 



24 

 12 



11 



14 

 15 

 16 



33 

 26 

 22 







37 



1 









Total.. 



456 





563 



17 



12 



17 



14 











Table LIII. — Longevity of male and female moths of the first brood; summary of Table 



LII. 



Observations. 



Average . . 

 Maximum 



Minimum. 



Life of 



male 



moths. 



Days. 

 9.57 

 32 

 1 



Life of 

 female 

 moths. 



Days. 

 11.49 

 37 

 1 



Length of life of male and female moths. — A summary of observations 

 from 1,910 individual moths is recorded in Table LII. The condi- 

 tion under which the moths were kept has already been referred to 

 on page 39. As observed for the previous brood, the longevity of 

 the males was shorter than that for the females. On an average the 

 males lived 9.57 days and the females 11.49 days; the maximum 

 length of life for the males was 32 days and for the females 37 days. 



It is of interest to note that the results obtained by the writer at 

 North East, Pa., in 1909, x are almost identical with those given 

 above; the average length of life for the males being 9.79 days and 

 for the females 11.47 da vs. 



Bui. SO, Pt. VI, Bur. Ent., U. S. Dept. Agr., p. 91, 1910. 



