632 
GILBERT E. JOHNSON. 
Ten larvae of the F3 generation were isolated from one of 
the most prosperous of these eight broods. All grew up into 
Table 3. — Culture E. 
'1399 9 9 9 9 
F2 99999999 
9 ^ 
? 5 
? 5 
? 9 9 
^ o o o 
o 
^ 9^ 9^ 9 $ ° ° ^ 
\ \ 
9 ^ 
? 9 o 
F7 ^(^^OOOOOOO 
Fa 
females, nor did I see any males among the un-isolated 
remainder. All the females reproduced except one, which 
