xir, D, 4 Wileman: Japanese Lepidoptera 239 



females are creamy white and pale buff. Leach remarks of 

 imparilis that — 



the black maculation is a variable character in the female; one example 

 of this sex from Hokkaido (Yezo) is devoid of markings with the ex- 

 ception of a black dot on the left primary. 



I possess a specimen similar to that described by Leech. 



Local distribution. — Honshu : Tokyo, Musashi Province, August 

 (Wileman) ; Nikko, Shimotsuke Province, August (Wileman) ; 

 Yoshino, Yamato Province, August and September (Wileman). 

 Hokkaido: Hakodate, Oshima Province, August (Wileman). 

 Throughout the Japanese Islands (Matsiimu7-a, Seitz) ; very com- 

 mon in Hondo (Honshu) ; the larvae are very common on various 

 plants in Tokyo (Miyake). 



Time of appearance. — Larva, May, June, and July, hibernates ; 

 imago, July, August, and September. Single-brooded. 



General distribution. — Japanese Islands only. 



Diacrisia infernalis Butler. 



Plate II, fig. 2, larva; fig. 3, food plant; figs. 4 and 5, imago and head 

 of variety 1, immaculalis nov., 5; figs. 6 and 7, imago and head of 

 variety 3, ?, unnamed; figs. 8 and 9, imago and head of variety 4, 

 maculalis nov., ?. 



Japanese name, kurobane-hitori and kurohane-hitori. 



Thanatarctia infernalis Butler, Ann. & Mag. Nat. Hist. (1877), IV, 

 20, 395; 111. Typ. Lep. Het. (1879), 3, 7, PI. 42, fig. 9, d"; Leech, 

 Proc. Zool. Soc. London (1888), 617, No. 182; Kirby, Cat. Het. 

 (1892), 277; Leech, Trans. Ent. Soc. London (1899), 160, No. 519; 

 Hampson, Cat. Lep. Phal. (1901), 3, 312, c? and ?; Matsumura, Cat. 

 Insect. Jap. (1905), 173, No. 1456; Miyake, Bull. Coll. Agr., Tokyo 

 Imp. Univ. (1909), 8, 167; Seitz, Macrolep. Faun. Pal. (1910), 1, 

 87, PI. 15 /, c?; Matsumura, Thousand Insects of Japan [Nihon 

 Senchu Dzukai (Jap.)] (1911), suppl. 3, 6, PI. 30, fig. 9, ?. 



The larva figured (Plate II, fig. 2) was taken in May (figured 

 June 1), 1901, at Kobe, Settsu Province, Honshu, on willow, 

 Japanese name, yanagi (Salix). A female imago emerged from 

 the resulting pupa in July, 1901. This female is not typical, but 

 is an interesting aberration and is much more heavily maculated 

 with fuscous spots than variety 4, maculalis var. nov. (Plate II, 

 figs. 8 and 9) . It shows basal, antemedial, and postmedial bands 

 on the forewings, the buff -colored ground color showing through 

 but faintly on all the wings, especially on the hind ones. I bred 

 a black male imago on July 3, 1901, at Kobe, the larva of whic]i 

 agreed with my. original figure of the larva that produced this 

 female aberration; otherwise I might have regarded it as the 

 female of a different species. Subsequent experience at Hako- 



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