3〇' Niphanda fusca, Brem. and Grey, (Pi, 4， fig. 2.) 



N . dispar. Brem. 



Local 山 es — Nikko, Fujisan. 



Time of appearance ― June, September. 



The specimen figured is the female ； the male has more sharply pointed wings ク and the coloration of 

 the upper surface is dull purple. It frequents high lands and mountain slopes. 



31. Dipsas ssspestriata, Hew. (Pi- 4， fig- 3 ) 



【^och lilies ― Yokoliama, Tokyo. 

 Time of appearance ― May and June. 



32. Dipsas lutsa, Hew, (Pi- 4, fig. 4.) 



Localities ― Yokohama, NikUo, Yezo, Asama yaiua. 

 Time of appearance —— IMay and June. 



33- Dipsas jonasi, Janson. (Pi. 4， fig' 5-) 



Localities ― Yezo, Yolcokawa, Asama-yama. 

 Time of appearance ― June, July. 



These three species form a ver_y beautiful and exceptional group of the Japanese Lvcaenidas, and I 

 therefore treat them together. In the case of Dipsas lutea and jonasi, we have an undoubted case of 

 *' duality." D . lute a is found both on the mountains and on the plains, but is more abundant in the 

 mountains. D. jonasi, so far as my experience goes, is a mountain insect only. D. sa^pestriata ) on 

 the contrary, is found on the low land only, and I liave not yet seen it from Yezo. The coloration of tlie 

 females of all three species is very remarkable ― in every instance they have almost completely assumed 

 the coloration of the males, contrary to the rule in most of the Japanese Lycaenidae. The Lycsenidae, we 

 know positively, are descended from ancestors, both sexes of wliicli were originally dull-colored, and the 

 majority of the females retain this characteristic, while the males are in many instances ^aily colored ； 

 but in this group both sexes are almost exactly alike in point of beauty, the females still, however, gene- 

 rally showing a trace of their original dull color, in the black tip to the wing. All three species are most 

 active from about two hours before sunset until dusk, and daring this time the males are to be seen flying 

 about the tops of the trees and engaging, often three or four at a time, in an aerial contest. 



34. Thecla smaragdina, Brem. (Pi. 4， fig- 6a, 6b.) 



Time of appearance ― Julv, August. 



、ひ "一、 fc ^ 6rky J 



