314 Heredity of Melanism in Lepidoptera 



It is hoped that the whole question can be settled during the next 

 few years. 



In conclusion, with regard to most species which have melanic forms, 

 the evidence is not extensive, but the weight of evidence up to the 

 present seems to show that melanism in Lepidoptera frequently follows 

 the Mendelian Law of Heredity, and in most cases is dominant, but in 

 some few species is recessive. 



I wish to record my indebtedness to the various observers mentioned, 

 especially Messrs Mansbridge, Prout, Porritt, J. W. H. Harrison, and 

 Buckley, for their courtesy in correspondence, and for permission to 

 include the data of their respective experiments. 



DESCRIPTION OF PLATE XXVU. 



1 — 12. Amphidasys betularia. 



1. Light type <? , Kent. 



2. Light type ? , Kent. 



3. Dark type c? , Kent. 



4. Dark type ? , Kent. 



5. Intermediate cf , Family 11.20. 



6. Intermediate ? , Warwickshire. 



7. Intermediate j . 



8. Intermediate ? , Family 12.2. 



9. Intermediate s, Family 11.20. 



10. Intermediate ? , Family 11.20. 



11. Var. doubledayaria s . 



12. Var. doubledayaria ? . 



13 — 16. Sinlosoma luhrieipeda. 



13. Type <? , Worcestershire. 



14. Var. Yorkshire s . 



15. Var. Intermediate i . 



16. Var. radiata ? . 



17 — 19. Boarmia repandata. 



17. Type cT , Devon. 



18. Banded ? , Devon. 



19. Melanic ? , Lancashire. 



20 — 22. Acidalia viryularia. 



20. Light {canteiieraria) ? . Hyeres parents. 



21. Dark ^ , London parents. 



22. Melanic ? . 



23 — 25. Aplecta iiebulosa. 



23. Type cf . 



24. Var. robsoni i . 



25. Var. thompsoni ? . 



