XIII, D, 4 Wileman: Japanese Lepidoptera lg3 



LASIOCAMPID^ 



Genus COSMOTRICHE Hiibner 



Cosmotriche Hubnek, Verz. Bek. Schmett. (1827), 188. 



Cosmotriche potatoria Linnseus. 



Plate II, fig. 1, larva; fig. 2, head; fig. 3, dorsal aspect. 



Japanese name, take-kareha. 



Bombyx potatoria Linn^us, Syst. Nat. (1767), 12, 813; Leech, Proc. 

 Zool. Soc. London (1888), 628, No. 232; Trans. Ent. Soc. London 

 (1899), 113, No. 397; Staudinger and Rebel, Cat. Lep. Phal. 

 (1901), 1, 122, No. 990; Matsumura, Cat. Insect. Jap. (1905), 1, 

 45, No. 368; Thousand Insects of Japan [Nihon Senchu Dzukai 

 (Jap.)] (1909), suppl. 1, 88, No. 149, PI. 12, fig. 6, ?; Grunberg, 

 Seitz's Macrolep. Faun. Pal. (1911), 2, 164, PI. 26/, t? and ?. 



Odonestis potatoria var. askoldensis Oberthur, Etud. d. Ent. (1881), 

 5, 38; Staudinger, Rom. Mem. Lep. (1892), 6, 316; Staudinger and 

 Rebel, Cat. Lep. Phal. (1901), 1, 122, No. 990a; Grunberg, Seitz's 

 Macrolep. Faun. Pal. (1911), 2, 164, PI. 26/, c?. 



The larva figured (Plate II, fig. 1) was taken in May (figured 

 May 31), 1902, at Hakodate, Oshima Province, Hokkaido, on 

 bamboo grass, Japanese name, sasa-kusa ( ? Lophatherum elatum 

 ZolL). It pupated on July 4, and a female imago emerged on 

 July 31, 1902. This female seems referable to var. askoldensis 

 Oberthur. Another male, which emerged at Hakodate on 

 August 4, 1902, from a larva compared with the foregoing 

 figure (Plate II, fig. 1), seems to be nearer to typical potatoria, 

 male. Both specimens are undoubtedly forms of potatoria Linn., 

 not of albomaculata Brem., the larva of which, as Staudinger'" 

 justly observes, is quite different from that of potatoria. Leech -'^ 

 remarks : 



In the series of this species from Japan there are specimens which 

 agree exactly with typical potatoria, Linn., and others which are most 

 certainly identical with 0. albomaculata, Brem., whilst between these two 

 forms are aberrations, including a dark one near the variety askoldensis 

 of Oberthiir, which cannot be satisfactorily referred to either form; these 

 serve as connecting-links and I think prove" the identity of 0. potatoria 

 and 0. albomaculata. 



Griinberg -^ says of askoldensis : 



* * * larger and darker than the European specimens. It appears 

 to be confined to the Ussuri district. East Siberia, for specimens from 



"Staudinger, Rom. Mem. Lep. (1892), 6, 317. 

 '"Leech, Proc. Zool. Soc. London (1888), 628. 



" This, I think, is disproved by the diff"erence in the larvae of potatoria 

 and albomaculata. — A. E. W. 



"Seitz's Macrolep. Faun. Pal. (1911), 2, 164. 



