1 64 



M I YAK li 



The collection of the Station added to my own, increased the material 

 of my study to over 600 specimens, referable to 179 species, of which 43 

 are Rhopalocera and 136 Heterocera. Among all the species, there is only 

 one which I consider to be new to science {Ilenia okiensis n. sp.) ; the rest, 

 excepting the few that for one reason or the other did not admit of exact 

 identification, are forms already described from other regions. Anyway, 

 it may be safely stated that the Lepidopterous fauna of Oki is very poor in 

 local characteristic species and presents, as might indeed be surmised, 

 essentially the same feature as that of the main island of Japan. On the 

 other hand, the fauna of the islands, especially of Dogo, may be said to be 

 comparatively rich in species and in many cases decidedly so in 

 individuals. 



The following annotated list was drawn up on the basis of my own 

 observations as well as on that of Mr. Tanaka's collection preserved in the 

 Station before mentioned. The classification adopted is that of Staudinger 

 and Rebel as set forth in their " Catalog der Lepidopteren des palaearc- 

 tischen Faunengebietes (1901)." Unfortunately the specimens in 

 Mr. Tanaka's collection bore no exact mention of localities, although it 

 was known they were all obtained in Oki and mostly in Dogo. 



RHOPALOCERA. 



Papilionidae. 



I. Papilio xuthus L. {Age ha). 



Leech, Butt. China, 11, p. 514(1894); Pryer, Rhop. Nihon., p. 3, pi. 1, 

 figs 2 a, 2 b (1886). 



Common in all the islands. 



