K. TOYAMA 



383 



Of eight matings, five gave all normal dark eggs, while three 

 gave all divoltine white eggs, which is the maternal chai'acteristic of 

 tetra- or divoltine females in their spring brood. 



2. ( $ crimson breed x ^ normal breed.) 



The reversed matings gave results identical with those represented. 



Female parent 

 I Crimson 



Male parent 

 Tetravoltine Onodahime 



)» 1' 



The extracted normal-egged \ 



foiTB from the cross be- 1 



tween Bombyx mori and [ 



Theophila mandarina j 



Chinese ' ' Dragon horn " 



Number of 

 Matings 



4 

 5 



Eggs laid (f i) 

 normal dark 



2 and 3 divoltine white 



greenish slate 



The results of the reciprocal matings shew us that in the Fi eggs 

 normal coloured or greenish coloured characteristics dominate over the 

 crimson, while the voltine characteristics are, as in other egg-character- 

 istics before enumerated, maternal in inheritance. 



B. F„ Eggs. 



The worms and moths derived from the reciprocal normal-coloured 

 ^1 eggs in the summer of 1910 were all dark-eyed, and the moths 

 paired inte?- se gave the following F2 eggs : 



Totals 



1454 



521 



