76 



A. FRANKLIN SHULL 



Since L from L, and H from L show almost precisely the same 

 viability, selection for high and low viability within the low 

 viability lot was entirely ineffective. 



Effect of selection for high and low viability in the high viability 

 series {repeatedly inbred) 



Li from H. Females of the parthenogenetic line bred from a 

 low viability family in H3 were mated with males of the same 

 line May 13 to 23, 1912. From 18 such females were obtained 

 161 eggs, of which 91, or 58.3 per cent, hatched prior to June 5 

 (table 33). 



One of these 18 females laid nine eggs, of which only one 

 hatched (11.1 per cent of viable eggs). From that one a parthe- 

 nogenetic line was reared, as in table 34, including 16.1 per cent 

 of male-producers. 



TABLE 32 



Showing number of fertilized eggs that hatched, out of 74 in lot (H from L), figure 1 



Percentage of viable eggs. 



32.4 



TABLE 33 



Showing number of eggs that hatched, out of 161 in lot {Li from H), figure 1 



Percentage of viable eggs. 



58.3 



