72 Inheritance of Melanism m Tephrosia (Ectropis) 



For convenience sake in tabulation, the broods in the latter case 

 from extracted insects and from wild stock are recorded together whilst 

 in the former, as certain broods were lumped in obtaining the strain 

 with which the investigations were begun, they are of necessity lumped 

 in the table. 



TABLE VI. 



Homozygous Type x Homozygous Type {mm x mm). 



After giving due weight to all of the observations included in the 

 above six tables it must be concluded that, when typical insects from 

 Kent and melanic insects from York provide the material for investiga- 

 tion, melanism forms a single unit character behaving in inheritance 

 in a strictly Mendelian manner. 



(2) Similar experiments where the melanics and types were from, the 

 same or adjacent colonies. 



As the details agree so closely with those outlined above, and lead 

 to precisely the same conclusion, the tabulated figures will be supplied 

 with a minimum of comment. 



The broods with which these experiments commenced were obtained 

 from a wild black female from Birmingham and from a type female from 

 Delamere Forest. As the evidence from the broods and from their 

 subsequent behaviour proves almost conclusively that each resulted 

 from parents one of which was a homozygous recessive and the other a 

 heterozygous melanic, they are placed together in the table. 



TABLE VII. 



Heterozygous Melanic x Homozygous Type (Mm x tow). 



Melanics Types 



Fauiily Parentage Males Females Totals Males Females Totals Melanic 



a Wild melanic ?( (J type?) 8 10 18 7 6 13 — 



b Wild type ${ (J melanic?) 13 16 29 15 13 28 — 



Actually reared 47 41 54-4 



Theoretical result ... 44 44 50 



