sport in Melasoma and its Behavior in Heredity 22/ 



DIAGRAM V — Mating Category e 



First Matings S x S B x B ? ? 



V V 



First Generation S, B and AB (sport) B and AB (sport) B x B 



^ ' ^' 



Second Generation AB, B and I (mixed) B (all) 



Third Generation B (all) Band AB (3.6: 1) B, AB and I (mixed) 



DIAGRAM VI — Mating Category f 



First Matings S X S B x B 



V V 



S, B and AB (sport) B and AB (sport) 



' — < — ' 



AB, Band I 



\ 



I 1 



BandAB(3:l) B and AB (with an occasional I) 



The following table gives the results in total as to the character 

 of the individuals reared in the third generation in the different 

 categories, from the first matings, the lineage for which is given 

 in these diagrams. 



In the papers previously referred to on "heredity of dichromat- 

 ism," it was shown that the color type S is dominant over the 

 color type B, not at first completely so in every case, but showing 

 from generation to generation an increasing prepotency in that 

 direction. B was considered recessive in that it disappeared 

 wholly or partially in the first generation of a cross between S 

 and B, but bred true from the time of its reappearance in the sec- 

 ond generation. Because B in its ontogeny passes through the 

 S stage, it was suggested ('05) that S represents possibly the older, 

 B the newer type. AB in its ontogeny passes through the S and 

 B stages. Its normal infrequency of occurrence makes it appear 



