Y. TANAKA. 
96 
2) S. Striped black. 
The larva is generally black, except the inter-segmental regions of 
abdominal segments where we find transverse white bands. “Eye spot” and 
two pairs of “lunules” are always present there, but they can not be distinctly 
observed in consequence of the general darkness of the body. The char- 
acteristic stripes become more conspicuous towards the later stage of larval life, 
while the young worms are hardly distinguishable from those of other strains. 
This type is often found in the Chinese races. 
The striped black is epistatic to the common and to the plain. ( Ex- 
periments : Toyama, The Author.) 
3 ) Z. Zebra-pattern or tiger-banded. 
The larva of this strain is white, but provided with inter-segmental 
bands of black to dark brown colour, so that it shows an appearance charac- 
teristic to the coat of zebra or tiger. Such a strain is met with in Siamese, 
Chinese, Korean and some European (Italian salmon, Papillons noirs, etc.' 
races. 
The zebra-pattern is dominant to the common and plain types. (Ex- 
periments: Cotjtagxe, Kellogg, Toyama.) 
4j M. Moricaud 0 or darkv. 
Besides the body is provided with the distinct marking pairs, “eye-spots” 
and “lunules”, it is covered by numerous irregular dark striations and dots 
which give the larva a peculiar appearance somewhat resembling to the wild 
mulberry-silkworm, II. mori var. mandarina. This type is often encountered 
in Chinese, Korean and some European (Bagdad, etc.) races. 
The moricaud is dominant to the normal and plain characters. (Ex- 
priments: Coutagne, Toyama, Kellogg, The Author.) 
5 ) sszzmmnn. Plain ; absence of all marking characters."-* 
When very young this form is provided with some distinct markings, so 
that it is scarcely distinguishable from the larvae of normal type. Later, 
these markings become less conspicuous and at last are reduced to mere faint 
1) A French name used by Coutagne and later also by Kellogg. 
2 ) Apparently the plain contains a factor or factors on -which the markings of young 
larvae depend. But as we are dealing with marking in the full-grown larvae in the 
present discussion, such factors are not taken into consideration. 
