t)n the varying dominance ol certain white breeds of the silk-worm, ulc. 257 



Tabic II. 

 European white breeds inbred. 



I. Japanese white x European yellow. 



In the first place, we shall notice results of crosses between 

 Japanese whites and European yellows. The whites used are divoltine 

 (Asakains/iiki, and Aojiku) and tetravoltine (Oiiodahiine) breeds, both 

 of which have been in my possession since 1907 and were proved to 

 be homozygous. The yellows are, on the contrary, extracted forms 

 from Italian white and "&'«« Blanc''' referred to above. 



The results of crossing are shown in Table III. 



