Ay DEPARTMENT BULLETIN 179. 
On May 10, 1916, 25 females 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 FERTILITY. 
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. 
male May. June. 
No. | 
15 | 16 17 | 18 |10 | 20| 2 29 |) 93% 01994-1251 026 27) 1 28 29 | 30 | 31 cle? fe, 3 
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| Ea ISS EPA a i a sine ny Mr 20/59 tec [Co ier 2s | Sa a ieee ee 
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a ae eked 
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. 
K 
