346 The Inheritance of Wing Colour in Lepidoptera 



The breeding of the above parents may be found from the genealogical 

 table. The % parent of '18 Q was selected, as being one of the darkest 

 types, similar to Fig. 8, Plate XIII. Both parents of '18 iT were the same 

 shade, nevertheless only a few per cent, of the offspring approached the 

 same depth as their parents. 



It can be concluded, therefore, that in the case of B. consortaria, 

 as in that of T. consonaria, the melanic variety is a simple mendelian 

 dominant. 



My thanks are due to Mr L. W, Newman for supplying me with my 

 original material. I am also indebted to Professor Harrison, Professor 

 Doncaster and Professor Punnett for help in the preparation of this 

 paper, and to Miss Helen Moodie for her constant care of the larvae. 



DESCRIPTION OF PLATE XIII. 



Boarmia consortaria and var. consobrinaria. Natural size. 



1. B. consortaria ^. Type, bred from type x melanic. 



2. B. consortaria ^. Type (New Forest). 



3. B. consortaria ^. Dark intermediate from Oxshott. 



4. B. consortaria ^. Dark brown intermediate from family '181/. 



5. Var. consobrinaria ^. Melanic. 



6. Var. consobrinaria ^. Melanic. 



7. B. consortaria $ . Type, bred from melanic x melanic. 



8. B. consortaria $ . Type. 



9. B. consortaria $ . Dark intermediate from Oxshott. 



10. B. consortaria $ . Dark brown intermediate from family '18 L. 



11. Var. consobrinaria $ . Melanic. 



12. Var. consobrinaria ^ • Melanic. 



