214 



D. D. Will I \1 V. 



TAHLK III. Concluded. 



in the three strains, A, B, and C, when all external conditions 

 are identical the only conclusion that can he drawn is that the 

 three strains differ at least in regard to this single characteristic. 

 Perhaps they all may be potentially alike in their capacity to 

 produce male-laying females but some races may be more easily 

 effected than other races by the influence which causes male- 

 producing females to be produced. 



Whenever races A and B were put into newly made diluted 

 uncooked culture media in battery jars great numbers of fertilized 

 eggs were produced in U>ih races. From general observations 

 they seemed to be produced in equal numbers, thus seeming to 



1 Food media was diluted accidentally. 



