THE DETERMINATION OF DOMINANCE. 



295 



L. signaticollis ? X J^ I" diver sa. 



Exp. No. H 409/411. 

 A female of L. signaticollis and a male L. diver sa were allowed 

 to reproduce under the conditions of the first experiment (Exp. 

 No. H 409), while a certain number of their eggs were being laid 

 (designated as Lot A). These eggs developed normally under 

 the following conditions: 



and gave typical larvae, which gave two classes of adults in the 

 Fj generation in the proportion of approximately 1:1, or 



sig- type. 



mid type. 



94. 



The individuals like the female parent (sig. type), when inbred, 

 came true to the type for four consecutive generations, which 

 was as far as they were carried ; while the mid types, when inbred, 

 gave in the F2 generation marked Mendelian ratios in the pro- 

 portion of 1:2:1, the numbers for Pair B being: 



After a few days the same pair of individuals was placed under 

 the conditions of Exp. No. H 410: 



Food : Normal — uniform. 



R. H. 

 4.3°. Day Av. 51.2 per cent. 

 5.8°. Night Av. 81.5 per cent. 



±11 per cent. 

 ±14.2 pel cent. 



and there allowed to develop another set of eggs (Lot B). 



These eggs developed normally and gave in the F^ generation 

 only a single type like the signaticollis parent, which, when inbred, 

 gave in the F2 generation signaticollis, and continued to breed 

 true for four consecutive generations. This experiment was 

 repeated seven times with uniform results, confirming the 



