Dichromatism in Lina Lapponica. 



131 



to whether the B character \v^ould reappear according to Men- 

 dehan expectations, or the S character again carry over. 



Experiment 5". Inspection of Table I, a, columns 6 and 8, 

 shows that some of the S X S matings produced pure broods, 

 while some produced mixed broods. A number of matings were 



Table IX — B X B. {From S XS, Same Parentage as in Table X.) 



made between similars from mixed broods, columns 9 and 10, to 

 obtain data for comparison with Tables II and III. 



It will be remembered that Table II represents results of B X B 

 that had bred true to B X B parents, and Table III represents 

 results of S X S that had bred true to S X S parents. 



Tables IX and X represent results of matings of B X B and 

 S X S, respectively, between individuals from mixed broods, i. e., 

 from broods that had not bred entirely true to parentage. 



