SHORTER ARTICLES AND DISCUSSION 



A NOTE ON THE GONADS OF GYNANDROMORPHS OF 

 DROSOPHILA AMPELOPHILA 



Five gynandromorphs of Drosophilo <un< Inphila were sec- 

 tioned and their gonads studied in order to determine whether 

 the gonads corresponded to the secondary sex characters ex- 

 pressed by the somatoplasm. The specimens were either lateral 

 or fore and aft gynandromorphs. 



I. This gynandroniorph arose from a cross between a white 

 eyed fly and a fly of the wild type. On one side of the body the 

 eye was red, the wing long, the sex comb lacking, and the ab- 

 domen characteristically female. The other side had a white 

 eye, short wing, sex comb and male abdomen. The external 

 genitalia were abnormal. 



The fly would not mate, not only because of the abnormality 

 of the genitalia, but because its mating instincts were indifferent. 

 It was courted bv males but. in turn, it itself did not court 

 females. 



Since the fly was externally a bilateral gynandroniorph one 

 would expect to find that the gonads on one side were male and 

 on the other side female. This, however, was not the case. The 



ripe spermatozoa. 



II. This fly arose from a cross of cherry club vermilion with 



