344 The Inheritance of Wing Colour in Lepidoptera 



as all the melanics in the previous year had been paired to types. 

 Several matings of this description have however now been made, and 

 the results will be known next summer. The expected ratio of 3 : 1 is 

 not very closely approached in the above table, there being an excess 

 of nearly 6 per cent, of types, which is unusual. The numbers are 

 however not very large, but clearly the divergence is due principally to 

 family '18 G, which from the ratio of the offspring might almost belong 

 to the DR X RR type of mating. 



The result of mating heterozygous melanics by type was as follows : 



* The ova from this pairing were given to Mr W, Moore, who very kindly reared them 

 for me and showed me the resulting specimens. The identity of the parents, however, has 

 unfortunately been lost. 



The melanics were all bred from one or other of the 1917 melanic 

 X type or melanic x intermediate pairings, shown in the pedigree. In 



