138 Inheritance of Wing Colour in Lepidoptera 



The two type females which are included represent less than O'o per 

 cent., and are no doubt due to the accidental inclusion of eggs or 

 larvae with the wrong brood. 



The result of pairing two melanics, both of which were heterozygous, 

 was as follows : 



The expected ratio is very nearly realised, in spite of the fact that 

 there were only two pairings of this nature. There is as usual an excess 

 of a few melanics. A few of the extracted types were as dark as var. 

 sericearia (PI. VI, figs. 1 and 2), and most of them were rather darker 

 than the wild types, though a few resembled figs. 5 and 6. 



The result of pairing homozygous melanics by wild types from the 

 New Forest strain, was as follows : 



Melanic x Type. 

 [DD X RR\ ' 



Family 

 '18 

 '18 P 

 '18 X 



Imagines 



Parentage 



Female Male 



Melanic x Type 

 Type X Melanic 

 Type X Melanic 



Male 

 33 

 41 

 13 



Melanic 



Female 

 29 

 32 

 19 



Totals 

 62 

 73 

 32 



Type 



Male Female Totals 



Total 



167 



In this case the offspring include no type specimens, but only 

 melanics, as was expected. 



The result of pairing heterozygous melanics by type was as 

 follows : 



