460 



H. H. NEWMAN 



TABLE 1-Continued 



1 week 



9 days 



12 days 



13 days 



14 days 



15 days 

 3 weeks 



PURE F. DIAPHANUS (CONTROL) 



Embryo as in fig. 19, almost 

 even with the hybrid strain in 

 stage of development, other 

 details about as before 



Embryos comparatively light 

 colored, tail long and slender 



None hatched 

 A few hatched 

 About half hatched 

 All hatched 



Larvae vigorous and would 

 doubtless live indefinitelv 



F. DIAPHAJ)X3S 9 X F. HETERGCLITUS d' 



Embryos as in fig. 20, tail shorter 

 than in control, other details 

 as before 



Embryos much darker than con- 

 trol, decidedly larger and more 

 advanced 



Nearly all hatched 



All hatched and very active 



Larvae larger and more active 

 than control, evidently grow- 

 ing faster under like conditions 



