
BROOD -DAYS 
PER EIGHT DAY PERIOD 
PLATE XIV 
SEASONAL FLUCTUATION IN BROOD 
POPULATIONS BY AGE CLASSES 
Jelerere? 
sagetesore 
setetete! 
spererere 
rotates 
‘sqegeueze 
OOO 

tetera 
De) 
Hye ute te? 
tetas”, 
Mehetetet 
*teteret 
Koto 
eet tet 
a es 4.0.0.5 
20 
100 
80 
60 
40 
20 

0 
40 
20 

0 
20 : 
SAQwALE N | 
0 
20 

'e) 
DATE ei8-6/26 6/26-7/4 7/4-7/12 7/i2-7/20 "Y20-7/28 7/28-8/5 8/5-B8/I3 8/13-8/21 
Pn See eS ee eS (es i  : a ee! a ee ee Cae Pe 
AGE CLASS | 
vue AGE CLASS I 
AGE CLASS il 
MM UNAGED 
