368 



ROSCOE R. HYDE 



EFFECT ON FERTILITY OF CROSSING THE TRUNCATES WITH 

 THEIR LONG-WINGED BROTHERS AND SISTERS AND THE EFFECT 

 ON FERTILITY WHEN BOTH OF THESE FORMS ARE CROSSED INTO 

 THE WOODS HOLE STOCK 



I wish to return to a consideration of the low fertihty of the 

 truncate stock and consider more especially the difference in 

 fertility between the truncates and their long winged brothers 

 and sisters. I shall also consider the behavior of fertility when 

 the truncates are crossed to their long winged brothers and 

 sisters, and also the behavior of fertility when both forms of the 

 inconstant stock are out crossed to the Woods Hole stock. 

 Table 8 shows the combinations made up, the number of eggs 



TABLE 7 



Showing the fertility of the long-winged brothers and sisters of the extracted truncates 

 when tested together and when crossed with each other. A = F2 long-wing extracted 

 from truncate grandmother. B = F2 long-wing extracted from truncate grand- 

 father 



