8 



RHOPALOCERA NIHONICA. 



the irregular nature of the ground, which is composed of loose, volcanic scoriae, it is most difficult to cap- 

 ture. It never seems able to stray far from this place, and may be seen beating up and down, but never 

 descending below this bleak and cold locality. 



20. Colias hyale, L， (Pi- 2， fig. 4- ん， 4 -b.) 



simo(hi s Del Orza. 

 o'(it ど j E!sp. 

 subaurata % But. 

 eltvestij But. 



Localities— Main Island, Vezo. 



Food plant ― し egmniiioiis plants. 



Time of appeal ance ― February lu ^Nuvembe に 



This is one of the most abundant butterflies about Yokohama, and is Uie first harbinger of spring. It 

 may often be seen flying about a warm sunny ban k by the middle of February, vvlien the snow is still on 

 the ground. These are not hybeniated specimens, but freshly emerged, as I have often taken them then 

 with their wines hardly dry. The female is dimorphic, having a yellow and a white form. The difference 

 between a summer and a winter specimen is most marked, both in colour and size. It is found commonly 

 both on the plains and mountains. I have figured an exceptionally large female of the late summer brood, 

 and a male of that appearing in February. 



9-V 9 B -) 



Localities ― Centi al and Soulh J^pan. 

 Food plant ― し espedeza juiicea, Pers. 



Time of appearance —一 March (hybei nated specimens) to December. 



To the naturalist, this is the most interesting of all the butterflies of Japan, and therefore demands 

 a careful account of its very extraordinary lite history, which I will give as iuily as I have been able to 

 elucidate it. 



In the first place, I find, from observations of my own and fellow workers, that no species of the genus 

 Terias have as yet crossed the Straits of Tsugaru, between Yezo and the Main Island. Multiformis is 



し Terias multiformis, H. Pryer. び 



hecabe t L. 



mandariuiit Del Oiva. 

 hecabeoides, Men. 

 sinensis, 

 niaresiy But. 

 anemone^ Ft- 1. 

 connexiva t But. 

 rest ope t Men. 

 hrenda. 

 sari. Hois. 



