70 



THE ORIGIN OF GYNANDROMORPHS. 



GYNANDROMORPHS WITH INCOMPLETE DATA. 



A fly was figured by Morgan (Zeit. f. i. Abst. u. Ver. vn 1912, fig. 3) with 

 one long wing and one miniature wing (text-fig. 56). Its history has been 

 lost, but it is recorded in a paper giving crosses that involve miniature wings. 

 The fly was probably a gynandromorph. 



No. 28. February 11, 1918. T. H. Morgan. Text-figure 57 (drawing). 



Parentage. Uncertain; probably the gynandromorph appeared in a stock of 

 "serrate" extracted from a cross of dichaete (carrying serrate) to short notch. 



TEXT-FIGURE 56. 



TEXT-FIGURE 57. 



Description. The gynandromorph was largely female, the entire head 

 and the right side of the thorax with the right wing and legs being male. The 

 sex-combs seemed to be only half as large as that of a normal male. 



No. M. February 1912. E. M. Wallace. Text-figure 58 (diagram). 



Parentage. The ancestry is unknown. 



Description. The gynandromorph was largely female; the male parts 

 being the right dorsal half of the thorax with its wing, which were yellow in 

 color and of smaller size. 



No. H. July 1913. Text-figure 59 (diagram). 



Parentage. Ancestry unknown. 



Description. The fly was yellow and female to all appearances, except tip 

 of abdomen, which was male. A penis was present. Sections showed one 

 abnormal testis and one broken one. 



