H. Onslow 



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Mean colour 



value of 



hybrid 



parents 



- [1-4: 101 



Mean colour- 

 value of groxg 



parents 

 • [0-9: 0-6] 



100 



No. of insects 

 . 25. (Cf. Fig. 14.) Curve showing the distribution of the orange and yellow colour-values of the offspring from 



four pairings of hybrid {lutea x gross.) x A. (jrossulariata. 

 fcddition to the 8 o 2 , 9 ^ r^ included above, family *17 W contained 64 insects whose colour-value was less than [07 : 0-5]. 

 i following variations occur in certain insects, whose position along the base line of the curve is indicated by the 



accompanying numbers. 

 nily '17 W. hazeleighemis ^ ^38, 3<J, 40, 41, 43 



mpunctifasciata -f- ^\\, JIG ,, o 33,36 



iS^c>28, o G23, 24, 25, 44 Family '096 ^ • 



uZrapirafa 9 23 nigricottata i ^ ^'6,^, 17, 27, 45, 46, 48, .50 



nigricottata fff ^ <^28, 44, .58 lacticolor ^ ^ 1, 2, 3, 4, 5, 6, 9, 17, 27, 29, 45, 46, 47, 48, 49 



„ 9 34, 35 50, 51, 52, 53, 54, 55, 56 



$ 97, 8, 10, 11, 12, 13, 14. 15, 18, 19, 20, 30 

 %■ Bred by Dr Doncaster. 



