306 Proceedings of Indiana Academy of Science. 
2. Curved @ by vestigial . 
All the F, generation from this Combination have long wings of the wild 
type as is the expectation. These when inbred produced the different 
classes as given in tables VII and VIII. 
Table VII. F, gencration from curved 9 by vestigial <. 
Number Wild type Curved Vestigial 
Cit one oftes ote ouch DAS 
1 208 203 89 82 69 90 
la 81 97 38 40 30 32 
154 130 74 69 62 56 
2a 89 112 30 34 9 17 
3 156 124 61 64 63 78 
3a 128 139 61 Do 36 36 
4 104 88 51 39 49 48 
4a 70 83 21 37 i 24 
5 193 208 76 96 78 87 
da 84 105 15 19 7 9 
6 40 51 22 20 16 10 
6a 36 39 17 22 17 19 
d 41 49 9 9 15 12 
7a 52 47 16 8 17, 19 
8 64 78 40 34 4] 39 
8a 71 93 22 16 23 29 
9 93 75 35 26 38 35 
9a 58 64 20 24 20 27 
Total. . |. 1722 1785 704 692 607 s 667 
» 
3. Back crosses between the hybrid of curved and vestigial to the parent 
stocks. 
The genetic relation between curved and vestigial was studied in various 
combinations of back crosses between the hybrids and the parent stocks. 
Tables VIII—XV shows the different combinations made and the classes 
realized. 
