Group I. 



83 



Exp. 38. — Yellow vesiculated forked rugose. 

 Mating: yellow rugose X ve8iculat«d forked. 



Per cent cross-overs: y-vs, 21.1; vs-f, 40.1; f-r, 28.8; counting only vs flies, y-vs, 7.1; va-f. 47.1. 



Exp. 39. — Yellow vesiculated forked glazed. 

 Mating: yellow X vesiculated forked glared. 



Per cent crossovers: y-vs, 17.9; vs-f, 32.4; f-r«, 35.5; counting only vs flies, y-vs, 18.3; vs-f, 45.9. 



Exp. 40. — Crossveinless vermilion mageiita forked. 

 Mating: vermilion X crossveinless magenta forked. 



Per cent cross-overs: c-v, 0.4; v-m, 36.9 m-f, 1.9. 



