THE ORIGIN OF GYNANDROMORPHS. 



47 



No. Xi. January, 1914. E. M. Wallace. No diagram. 



Parentage. This gynandromorph arose in a mass-culture whose parents 

 were yellow white females and eosin males. 



Description. The gynandromorph was largely female. The male parts 

 were yellow and included the left dorsal side of the thorax with the shorter 

 wing and the left side of the abdomen. These parts were all smaller, bore 



TEXT-FIGURE 31. 



TEXT-FIGURE 32. 



smaller bristles, and the left half of the abdomen had male-type coloration. 

 The genitalia were female. The female parts throughout were wild-type in 

 body-color, including especially the left legs and all the head. There were 

 no sex-combs. The eyes were both white-eosin compound. 



Explanation. A yellow white X egg was fertilized by an eosin X sperm. 

 Elimination of the paternal X occurred. 



y w y w 



