FERTILITY AND STERILITY IN DROSOPHILA 



193 



TABLE 15 



Egg count showing the fertility of the truncate stock together ivilh the fertility 

 on c7-ossing into the Woods Hole stock 

 TABLE 15 a TABLE 15 b 



Woods Hole 9 X Woods Hole cf Truncate 9 X Truncate cf 



* Laid very small eggs; some looked 

 us if they might have been parasitized. 



TABLE 15 c 



* Escaped. 

 t Copulated. 



TABLE 15 d 



Escaped. 



