Analysis of Heterogeneity in Complex Characters 



267 



in biotype 6, where the addition of the posterior marginal areas may produce a 

 pattern with the posterior half almost uniformly black. From the same com- 

 bination there not infrequently results biotype 5, which lacks entirely the mar- 

 ginal areas, but is otherwise like the pattern of biotype 6. 



Biotype 4 + 

 multitaeniata form 



Biotype 1 + 

 multilineata form 



Fig. 50.— Graphic representation of effect of form-factors upon the pronotal 

 pattern type. 



F4 



Fs 



F2- 



I — I — t 



-1 



Biotype 8 Biotype 7 



Fig 51 —Showing effects produced In crossing of biotype 7 with biotype 12 and 

 results produced In the alteration of pattern. 



Different results follow when the neutral biotype 7 is combined with biotype 

 12 which gives as an Fg extracted biotype 8 (fig. 51,) and in the same way bio- 

 type 8 crossed with biotype 9 will give in F^ and F3, as an extracted type, the 



