180 Toyama. 
of some batches, to my astonishment, were of two kinds, one quite 
normal in color and the other beautiful orange-red without any 
intermediate forms. 
The characteristics of the red worms: the head of the newly 
hatched worm is shinig brownish-red, the ground color of the body 
beautiful orange-red, the hair bearing-tubercles lighter than the 
ground color and the hairs or bristles light reddish-brown. After the 
first moult, the ground color of the body becomes whitish and in 
the later stages we find two kinds of worms, one having the common 
markings, the other destitute of all markings, as in the pale worms 
of the common breeds. We can distinguish, however, the worms of 
the normal breeds from the red, since the markings which are dark 
brown in the former are light brownish red in the latter. 
In the common breed, however, the head of newly hatched worm 
is shining black, the ground color of the body smoky black, the hair 
tubercles light brown and the hairs and the bristles light smoky. 
For the sake of convenience, we shall call hereafter the former 
as the “red worms’” and the latter or the normal worms the “black 
worms’’. 
Of the 627 matings before mentioned, some, e. g., No. 6 gave 
rise to tow kinds of worms, red and black, while others produced 
black worms only, as is shown in Table 1. 
Table 1. 
No ofeggbatch 
Ze from each. Date of hatching Kind of worms hatched out 
parentage 
parent 
I 134 21st—22/June ’06. | Every batch produced simply black 
worms. 
2 139 do. do. 
4 102 do. do. 
7 115 do. do. 
6 137 do. 110 batches produced only black 
worms, 27 batches red and black 
worms in the proportion shown in 
Table 2. 
Each batch is the total of the eggs laid by a moth. 
The number of the red and black worms given by each mating 
of the parentage No. 6 is shown in Table 2. 
