xn,D,4 • Wileman: Japanese Lepidoptera 231 



July 30, 1902. The following description is taken from my 

 original notes: 



Larva. — Ashy gray. Long, slender hairs issue from segment 

 2 pointing forward, also from the spiracular line and anal seg- 

 ment. On segments 2 to 6 (counting head as segment 1) there 

 are long dorsal tufts of ashy gray hairs ; the tuft on segment 2 

 is the shortest, the tufts on segments 3 to 6 gradually increase 

 in length, the longest tuft being on segment 6. The larva bears 

 a most extraordinary vertical dorsal process situated between the 

 head and the succeeding segment (Plate "I, fig. 5). This process 

 consists of five chitinous plates, apparently the sloughed plates 

 of the head, which seem to indicate five molts, as the uppermost 

 plate, counting from the top of the process, is the smallest ; this 

 would seem to prove that the sloughed plates are pushed upward 

 vertically as each successive molt takes place. 



Pupa. — The cocoon, or pupa case, is somewhat triangular with 

 acute prolonged ends. It is attached to a twig and harmonizes 

 exactly with the bark. Two long tufts of hair issue from the 

 apex of the triangle. • 



local distribution. — Honshu: Oiwake, Shinano Province 

 {Pryer) ; Tokyo Musashi Province (Fenton) ; Yoshi-no, Yamato 

 Province, May and June {Wileman) ; Karuizawa, Shinano Prov- 

 ince, July {Wileman). Hokkaido (Yezo) : Jozankei, Ishikari 

 Province, and Hakodate, Oshima Province, July and August 

 {Wileman) . 



Time of appearance. — Larva, July; imago, May to August. 



General distribution. — Eastern Siberia (Sutschan and Ussuri, 

 near Chabarovsk and Vladivostock, Askold Island); Korea; 

 Japan. 



ARCTIID^ 



. LITHOSIIN.^ 



Genus ILEMA Hubner 



Ilema {Eilema) Hubner, Verz. (1827), 165. 



Ilema griseola Hubner. 



Plate I, fig. 6, larva {Ilema ssgrota Butler) ; fig. 7, pupa and food plant. 

 Japanese name, kishita-hosoba. 

 Bombyx griseola RiJBNER, Eur. Schmett. (1827), 2, fig. 97; Leech, 



Proc. Zool. See. London (1888), 599, No. 87; Alph. Rom. Mem. Lep. 



(1892), 6, 10; Hampson, Moths India (1894), 2, 80; Leech, Trans. 



Ent. Soc. London (1899), 181, No. 575; Hampson, Cat. Lep. Phal. 



(1900), 2, 168; Stgr. and Reb., Cat. Lep. Pal. (1901), 1, 377, 



