19,2 Wileman: Japanese Lepidopter a, VI 223 
article, named “Kusumushi Yo ho,” “the method of rearing 
camphor grubs,” which is as follows: 
Many persons have tried to manufacture “tegusu-ito” from the full- 
grown larvie of the “kuri-mushi” (chestnut grub). The process of manu- 
facture is as follows: 
Full-grown larvae which are just on the point of spinning their cocoons 
are selected. They are slit open and the silken threads extracted. These 
threads are then soaked in a solution made of vinegar, (of 35 per cent 
strength), pure water and a little salt. After that they are removed 
from the solution, stretched out and dried, and are now called “tegusu-ito.” 
These threads are now soaked again in white rice water [which is the 
water resulting after washing rice, preparatory to choking], for about one 
hour, after which they are taken out and dried. When thoroughly dry 
they are placed between walnuts wrapped up in layers of cotton cloth and 
gently rubbed. This imparts to them gloss and elasticity and a fine-looking 
“tegusu-ito” is the result. 
It is to be presumed that fresh green walnuts are used, as 
without the outer green skin they would probably be too hard 
and uneven for this purpose. 
Genus AGLIA Ochsenheimer 
Aglia Ochsenheimer, Schmett. Eur. 3 (1810) 11. 
Aglia tau Linnseus. 
Plate 2, fig. 7, larva; fig. 8, head; fig. 9, extended transverse section of 
larva; fig. 10, food plant. Larva of Aglia japonica Leech. 
Japanese name, yezo-yotsume. 
Bombyx tau LinnvEUS, Syst. Nat. 1 (1758) 497; Hubner, Bomb. 
(1800) pi. 13, figs. 51, 52; Staudinger and Rebel, Cat. Lep. Pal. 1 
(1901) 127, No. 1039; Jordan, Seitz’s Macrolep. Faun. Pal. 2 (1911) 
224, pi. 35, a, <3, ?; 35, b, ?. 
Aglia tau var. japonica Leech, Proc. Zool. Soc. London (1898) 632, 
No. 250; Trans. Ent. Soc. London (1898) 269, No. 16; Staudinger 
and Rebel, Cat. Lep. Pal. 1 (1901) 127, No. 1039 c; Matsumura, 
Cat. Insect. Jap. 1 (1905) 47, No. 388; Thousand Insects of Japan 
[Nihon Senchu Dzukai (Jap.)] (1909) suppl. 1, 49, pi. 8, fig. 
5, d; Jordan, Seitz’s Macrolep. Faun. Pal. 2 (1911) 224, pi. 35, a, <$. 
The larva figured (Plate 2, fig. 7) was taken in August, 1902 
(figured, August 18), at Hakodate, Oshima Province, Hokkaido, 
on maple, Japanese name momiji ( Acer sp.). A female imago 
of var. japonica Leech emerged from the resulting pupa on 
July 12, 1903. 
Jordan 24 describes the larva, pupa, and cocoon of the genus 
Aglia as follows: 
Young larv® with two dorsal rows of warts, which are long and thorn- 
like on the pro- and mesothorax, on segment 11 only one such thorn, anal 
24 Seitz’s Macrolep. Faun. Pal. 2 (1911) 224. 
