Group I. 



81 



Exp. 28. — Vesiculated hairy niogenta. 



Mating: vesiculated maRcnta X hairy. 

 4 cultures (V 1054-55, 1061-62). 



Non-cross-overs (vs m 32; ha 39) 71 



Co. region 1 (vs ha 22 ; ni 24) 46 



Co. region 2 (vs 0; ha m 2) 2 



Co. region 1-2 (vs ha nil;-Hl) 2 



Total 121 



Per cent cross-overs, vs-ha 39.6; ha-m 3.3; 

 counting only vs flies, vs-ha 41.8. 



Exp. 29. — Hairy magenta forked. 



Mating: hairy X magenta forked. 

 4 cultures (V 1114, 1116, 1119-20). 



Non-cross-overs (ha 105; m f 53) 158 



Co. region 1 (ha m f 1 ; -|- 4) 5 



Co. region 2 (ha f 0; m 2) 2 



Co. region 1-2 (ha ni 1 ; f 0) 1 



Total 166 



Per cent cross-overs, ha-m 3.6; m-f 1.8. 



Exp. 30. — Magenta forked triangle. 



Mating: magenta forked X triangle. 

 2 cultures (P 911-12). 



Non-cross-overs (m f 109; T 129) 238 



Co. region 1 (m T 1; f Ij 2 



Co. region 2 (m f T 5; + 24) 29 



Total 269 



Per cent cross-over.«, m-f 0.7; f-T 10.7; 

 counting only T flies, f-T 3.7. 



Exp. 31. — Magenta forked droop. 



Muting: magenta forked X droop. 

 4 cultures (K 1270-1. 1310-11). 



Non-cross-overs (m f 50; d 47) 97 



Co. region 1 (ni d 1 ; f 1) 2 



Co. region 2 (ni f d 15; -1- 45) . . 60 



Co. region 1-2 (ni 1; f d 1). . . .. 2 



Total 161 



Per cent cross-overs m-f 2.5; f-d 38.6; 

 counting only d flies, f-d 25.0. 



Exp. 32. — Triangle short droop. 



Mating: Triangle short X droop. 

 4 cultures (M 184, 205, 210, 225). 



Non-cro-ss-overs (T s 120; d 117) 237 



Co. region 1 (T d 7; s 6) 13 



Co. region 2 (T s d 31 ; -|- 32) 03 



Co. region 1-2 (T 0; a d 2) 2 



Total 315 



Per cent cross-overs: T-s 4.8, s-d 20.6. 



Exp. 33. — Short rugose droop. 



Mating: short droop X rugose. 

 6 cultures (M 280, 283, 304-7). 



Non-cross-overs (s d 138; r 149) 287 



Co. region 1 (s r 20; d 15) 35 



Co. region 2 (s 57; r d 11) 68 



Co. region 1-2 (s r d 0: -|- 19) 19 



Total 409 



Per cent cross-overs, s-r 13.2; r-d 21.3, 

 coimting all flies; counting only d flies, r-d, 6.7. 



Exp. 34. — Sepia crossveinless singed short. 

 Mating: sepia crossveinless X singed short. 



Per cent cross-overs: se-c, 21.9; c-si, 17.7; si-e, 39.0. 



