500 Universil !j of (UiJifomia PiiJAUaiions in ZooJofjij L^ol. 13 







TABLE VIII 







Showing 



Daily 



Hatchings of Normals 



AND Extras 



Mating 

 Letter 





Bottle Month Day 



— Bristles 

 4 



5 



Y (P 





1 March 6 



14 

 16 









7 



1 







8 



]2 









9 



6 



6 







10 



5 



5 







11 



7 



3 







2 12 



10 









13 



12 









14 



8 



3 







15 



9 



4 







16 



3 



2 







17 



3 



1 



X,c 





1 March 10 



7 











11 



4 



1 







12 



10 



1 







13 



12 



3 







14 



3 " 



1 







2 15 



4 









16 



4 









17 



16 









18 



13 



2 







19 



3 



1 







20 



4 



1 







21 



5 





Xa 





1 March 13 



6 



3 







14 



20 



3 







15 



28 



4 







16 



7 



2 







17 



5 



1 







18 



3 









2 19 



3 









20 



8 









21 



20 



2 







22 



7 



3 







23 



4 



1 







24 



2 



1 



If abundance of food were the prevailing factor, more extra- 

 bristled flies should occur in the first and second day's hatchings, but, 

 as this is not the case, it seems safe to conclude that abundance of food, 

 while perhaps a factor, yet can not be said to be the controlling factor. 

 More often than not, the first day's hatchings were all normal, and 

 on the second and third days the largest number of extra-bristled flies 

 appeared. Extra-bristled flies continued to appear up to the end of 

 the hatchings. 



