No. 579] SHORTER ARTICLES AND DISCUSSION 



185 



Showing the Eesult in 1 



expected ratio of three to one. There appeared in the F 2 gen- 

 eration from the scarlet male a total of 699 scarlets and 2,194 

 blacks, — a ratio of 3.14 black to one scarlet. From the scarlet 

 female there appeared in the F 2 generation 788 scarlets and 

 2,333 blacks,— a ratio of 2.96 black to one scarlet. It is to be 

 noted that the sex ratio is practically one of equality. 



Eoscoe R. Hyde 



A WING MUTATION IN A NEW SPECIES OF 

 DROSOPHILA 



A new wing mutation which appeared in my cultures of 

 Drosophila confusa Auct. (not Staeg.) is characterized by the 

 fact that the wings curve upward at an angle of about 45 degrees 

 from the region of the tip of the abdomen. The new wing re- 

 sembles somewhat the shape of a petal of the rose and is easily 

 distinguished from the wild species since the wings of the wild 

 fly project horizontally over and beyond the abdomen, as is 

 characteristic of the diptera. I shall refer to the new fly as 

 jaunty C. 1 



The wild stock from which jaunty C arose was taken in an 

 orchard on the Coss farm about seven miles south of North 

 Manchester, Indiana, in September, 1913. The original stock 

 was bred in a glass vial to which fresh banana was added from 

 time to time. Several stock bottles were made up from this 



i The wing is like that of jaunty in D. ampclophila and is here designated 



