SELECTION IN BAR-EYED RACE OF DROSOPHILA. 



385 



that the lower values in the later counts are entirely in agree- 

 ment with the results obtained at this time in the high and low 

 lines. 



Such changes in facet numbers of all the lines had already 

 been noticed in the vestigial-winged race and are clearly shown 

 at several points in Fig. 8. The changes would appear more 

 sudden and the agreement between the lines would be closer 

 it it were not for the fact that the change appeared sooner in 

 bottles that just began to hatch than in older bottles. 



THE APPEARANCE OF HETEROZYGOUS FEMALES AND FULL-EYED 



MALES. 



What developed to be the most puzzling phase of the entire 

 set of experiments was the appearance of full-eyed males and 

 heterozygous females in the stock bottles and in the selected 

 lines during the period they were under observation. Eleven 

 such individuals appeared at different times as shown in Table V. 



TABLE V. 



PEDIGREE OF FULL-EYED MALES AND HETEROZYGOUS FEMALES OBTAINED FROM 

 BAR-EYED STOCK UNDER OBSERVATION. 



1 The full-eyed males and bar-eyed females in Bau4t~3x were undoubtedly due 

 to the appearance of flies from the second generation before the counts were made. 

 The parents were mated April 3 and by an oversight the offspring were permitted 

 to remain in the bottle until April 27. 



