On the varying dominance of certain white breeds of the silk-worm, etc. 277 



Nearly the same figures as demanded by the calculation were 

 given by Kellogg ('ii) who mated Istrian or French yellow females 

 doubly with their own yellow males and Bagdad white males. The 

 results are quoted below: 



I. Results of mating Istrian yellow females doubly, viz., with 

 Istrian yellow and with Bagdad white males. 



Fl 



2. Results of mating French yellow females doubly, viz., with 

 French yellow and Bagdad white males. 



