88 



Tabulation of Data. 



Exp. 48 — Sepia crossveinless singed magenta forked short — Continued. 

 Mating: sepia crossveinless singed short X magenta forked. 



Percent cross-overs: se-c, 18.7; c-si, 14.0; si-m, 28.0; m-f, 3.2; f-s, 17.9. 



Exp. 49. — Oblique magenta forked short. 

 Mating: oblique short X magenta forked. 



Per cent cross-overs: o-m, 35; m-f, 9; f-s, 12; counting only not-o flies. 



Exp. 50. — Sepia crossveinless oblique short. 

 Mating: sepia crossveinless X oblique short. 



Per cent cross-overs: se-c, 27; c-o, 14; o-a, 43.2; counting only not-o flies. 



