K. TOYAMA 



379 



Egg-colour of the green breed : ordinary brownish slate with various 

 shades of green (Fig. 6), some of them having no green shade. It 

 resembles in colour the Chinese colour but the shades are different, 

 so we are able to distinguish the Chinese colour from that of Japanese 



Colour of Fi eggs 



one batch normal slate, the rest a mixture 

 of various green shaded eggs, i.e. ordinary 

 colour of green breed 



Japanese normal colour 



? Ivg X (f green 6 



i Sekai-ichi x j green .5 



(3) Reciprocal matings between the wild mulberry silk-worm 

 {Theopliila mandarina) and Japanese normal-egged breeds (Shinya- 

 hime), tetravoltine '■ Onodahime," tetravoltine " Tobuhime," univoltine 

 " Matamukashi "). 



Egg-colour of Theophila : grey, more or less shaded with green, 

 as has already been described. 



Matings 

 ? Shinyahime x <? Theophila 

 1 Onodahime x <f ,, 



? Univoltine Matamukashi x ij Theophila 

 5 Tobuhime x i Theophila 

 ? Theophila x <f Tobuhime 

 ? ,, i Matamukashi 



Number of 

 Matings 



Colour of Fi eggs 

 all Japanese normal colour 



all Theophila colour 



(4) Reciprocal matings between the normal (Fig. 1) and the 

 reddish brown egged (Fig. 2) forms found in the divoltine breed, " Shinka- 

 wachi." 



Matings 

 S normal x <? reddish-brown 

 ? reddish-brown x j normal 



Number of 

 Matings Colour of F, eggs 



all normal colour 



20 



15 



all reddish-brown, few being a little darker 

 shaded 



(5) Reciprocal crossings between the European yellow, " Papillons 

 noirs " and the Japanese normal-egged breed, " Tatsutahime." 



Egg colour of " Papillons noirs " : slate grey, more or less shaded 

 with green as in Japanese green ; sometimes without any greenish 

 shade ; the general colouration, however, differs from that of the 

 Chinese, Japanese or Theophila green, each of them having its own 

 characteristics: egg-colour of "Tobuhime," normal Japanese colour. 



Matings 

 S Papillons noirs x i Tatsutahime 

 ? Tatsutahime x <j Papillons noirs 



Number of 

 Matings 



Colour of Fi eggs 

 European greenish slate 

 all divoltine white 



26—2 



