22 



DEPARTMEi^T BULLETIN 119. 



On May 10, 1916, 25 fgmales were collected from winter quarters 

 and dissected for egg counts. The maximum number of eggs per 

 female was 56, the minimum 16, and the average 37. The ovaries of 

 each female also contained many eggs which had not yet reached 

 their full development. 



DURATION OF FEETILITY. 



The duration in the fertility of females varies greatly with dif- 

 ferent individuals. In some instances the full complement of the 

 female apparently is deposited at one time, and this fact accounts 

 for the large number of eggs occasionally found in single clusters. 

 Generally, however, the period of oviposition extends from a week 

 to 20 or 30 days and during this time the female deposits from 2 to 

 6 or 7 small egg clusters. (See Tables VI and VII.) The latter is 

 apparently the normal habit and explains the fact that the average 

 egg cluster found in the field is smaller than the average capacity of 

 normal females. 



Table VII. 



-Oviposition habits and duration of fertility of confined females of 

 Chlorochroa sayi. Record started May 10, 1916. 





Date eggs were deposited. 



Fe- 

 male 

 No. 



May. 



June. 





15 



16 



17 



18 



19 



20 



21 



22 



23 



24 



25 



26 



27 



28 



29 



30 



31 



1 



2 



3 



1 





3 













53 







7 









14 







14 







2 













56 



















3 



















32 























5 



















3-4 





6-44 





1-2 















g 



















1-2 



59 



4 















10 





















39 



















12 





















56 















30 



11-4-6 



16 

























8 







3 









17 



















16 





















18 



















43 

 32 







2-4 

 4 







7-2 











19 























19 



28 















20 



28 

































21 













40 







13 





















22 

















3 





3 

 33 

 12 



"i-i" 



3 

















23 

















34 



















24 



46 

















13 



26 

 15 

















25 

















2 

 33 



26 

 1 

















26 



16 

















9 



43 



60 



fl-1-1- 



n-1-1- 



12-31 

















27 

































28 





■■ 



































11 



30 



















I 





2-2 





































J 





















The ovaries of females dissected late in the autumn or in early 

 winter contain no eggs, but the abdomen is filled with a large amount 

 of fatty tissue. Fertilization is probably accomplished during the 

 last stages of hibernation in the very early spring and eggs develop 

 within a short time. The ovaries of 25 females taken from hiberna- 

 tion in March were found to contain an average of 37 eggs and many 

 additional immature eggs were- present. 



