19,2 Wileman: Japanese Lepidoptera, VI 221 
found chiefly on kuri , Spanish chestnut ( Castanea vulgaris Lam. 
var. japonica DC.), whence its popular name of kuri-kemushi or 
kuri-mushi is derived, equivalent to “chestnut caterpillar” or 
“chestnut grub” in English. Oberthiir gives Juglans mantsch- 
ourica as the food plant in Amurland. 
Cocoon. — Pryer 18 remarks : 
Commonly called the wire-cartridge moth, from the resemblance of the 
cocoon to the wire-net in a cartridge; last year, [1884], it was found feed- 
ing on poplars newly introduced into this country [Japan]. The natives 
make a strong coarse silk from the cocoon, and a fine gut from the intestines 
of the larva. Imago appears in October; larva hairy. 
Nawa 19 gives the following description of the larva which, in 
his figure, measures about 60 millimeters, much smaller than 
mine, which measures 103 millimeters. 
The larva at first is black and the head is covered with ashy white 
hairs; six small tubercles on each segment which emit long ashy white 
and black hairs; these become pale green when the larva grows bigger; 
head greenish yellow covered with pale yellow hairs; body pale green; 
the tubercles of each segment of the body emit long greenish white hairs, 
for this reason it is named shiragata-ro ; spiracular stripe black;, spiracles 
indigo-blue; subspiracular line yellow spotted with light red; ventrum 
dark yellowish green speckled with black spots; legs pale yellow; prolegs 
dark yellowish green and their extremities pale yellowish green. The 
cocoon is woven like a net and is commonly called sukashi-dawara, [or 
transparent rice-bag, because the pupa can be seen through the meshes.] 
Sasaki 20 gives descriptions and figures of the larva, pupa, 
and male imago of Dictyoploca japonica. He says : 
* * * the larva emerges between the end of April and commence- 
ment of May and feeds upon hyakujiklco, or sarusuberi [ Lagerstroemia 
indica Linn.] ; kuri, [Spanish chestnut ( Castanea vidgaris Lam. var. japo- 
nica DC.]; kusu-no-ki, [Camphor tree ( Cinnamomum camphora Nees)]; 
[ keyaki ( Zelkowa acuminata PI .)']•„ kurumi, [walnut ( Juglans sp.)]. It is 
full-grown between the middle of June and commencement of July and the 
imago emerges between the end of August and the commencement of 
October, when it oviposits. 
Matsumura 21 records the life history of the species and gives 
figures of the male imago, ova, larva, and cocoon. He says that 
“in Hokkaido it is single brooded and hibernates in the ovum 
stage.” The female deposits some three hundred forty or more 
18 Trans. Asiat. Soc. Japan 12 (1883) 52. 
10 Insect World 10 (1906) 63. 
20 Insects Injurious to Japanese Trees [Nihon Jumoku Gaichuhen (Jap.)] 
ed. 3 (1910) pt. 2, 89, pi. 199, larva, pupa, imago; Insects Injurious to Fruit 
Trees [Kwaju Gaichuhen (Jap.)] ed. 5 (1911) 216, pi. 70, larva, imago. 
21 Japanese Injurious Insects (Nihon Gaichuhen) (1899) 75. 
