X, D, 6 Wileman: Notes on Japanese Lepidoptera, III 349 



Leech remarks that Bombyx mandarina is "probably the wild 

 form of Bombyx mori. In color the imago is darker and the 

 markings are distinct, the female is much larger than the same 

 sex of B. mori." I have captured it in Honshu and Hokkaido 

 (Yezo) in June, August, October, and November, and Matsu- 

 mura records it from Hokkaido (Yezo), Honshu, Shikoku, and 

 Kyushu, and Seitz records it from eastern China, Korea, and 

 Japan. 



Seitz states that Bombyx ftiscata Motschulsky from Japan 

 appears, according to the descriptions, to be only a dark form 

 of mandarina. 



GEOMETRID^ 



GEOMETRINvE 



Genus EUCHLORIS Hubner 

 Euchloris Hubner, Verz. Bek. (1827), 283. 



Euchloris difficta Walker. 



Plate I, fig. 5, larva, lateral aspect; fig. 6, larva, dorsal aspect. 

 Japanese name, shirofu-aoshaku. 

 Comibaena difficta Walk., Cat. Lep. Het. (1861), 22, 576; Butler, 



111. Typ. Lep. Het. (1879), 3, 37, PI. 50, fig. 3, c?. 

 Euchloris difficta Leech, Ann. & Mag. Nat. Hist. (1897), VI, 20, 236; 



Matsumura, Cat. Insect. Jap. (1905), 1, 117, No. 1006; Nagano, 



Insect. World [Konchu Sekai (Jap.)] (1909), 13, 91, PI. 5, figs. 1 



to 8, larva, pupa, imago, c? ?• 

 Phorodesma gratiosaria Brem., Lep. Ost.-Sib. (1864), 77, PI. 7, fig. 1, 



? (teste Warren). 

 Ochrognesia difficta Warren, Nov. Zool. (1894), 1, 391. 



The larva figured (Plate I, figs. 5 and 6) was taken in May, 

 1901 (figured May 5), at Kobe, Settsu Province, Honshu, on 

 willow; Japanese name, yanagi. 



This larva was unfortunately thrown away with old dry 

 leaves when changing the daily supply of food, and I was never 

 able to discover another larva to breed and compare with the 

 figure drawn by my artist. I was much vexed that I did not 

 have an opportunity of further observing it, as it is a most 

 striking example of procryptic colors affording special protective 

 resemblance. 



Poulton defines this class of resemblance as "resemblance in 

 shape and outline, as well as in color, to some object in the 

 environment as a protection against enemies." ^ 



In this case the larva both in shape and outline mimics, or 



' See Wileman, loc. cit. 

 137400 3 



