RHOPALOCERA X/IIOXICA. 17 



perfect slate ; early spring forms are small and brightly colored, often with a row of blue spots on the 

 back margin of the hind wing, but as the temperature increases they become larger and darker until they 

 reach a size nearly twice that of English specimens. During the hot months the males are often quite 

 black, and this continues until the last brood in November ; a difference of 20 miles is, however, sufficient 

 to account for small light-colour males appearing in one locality and black males in another. Some years 

 ago, in this month, i.e. November, I collected the small light-colour males in the neighbourhood of Yoko- 

 hama, and the next day took black males in Boshiu not more than twenty miles from Yokohama, but by 

 working from Bosliiu toward the north, through Kadzusa, I found the dark form to be less abundant until 

 at Kanosan they were entirely replaced by the pale form. 



50. Lycaena bastica, Linn. (Pi- 4, fig. 22.) 



Localities Yamalo, Ogasawara, Yokohama, Ryukyti. 



Food-plant a cultivated Leguminous plain like the scarlet runner, but with pinkish-while flowers, Dolichos cultratus 



(J;ip. Fuji -mame). 

 Time of appeal ance March (Ogasawara); August, September (Yamato, Ryukyu); October, (Yokohama). 



This butterfly has a most extensive range, and I have taken it in every Eastern country in which I 

 have collected. It is abundant on the Island of Labuan, and also in Ogasawara, and is therefore pro- 

 bably to be found in all the intervening islands wherever its food-plant is cultivated. It is also found 

 in Europe, and is one of the great prizes for the English collector, a few specimens having been taken on 

 the south coast near Brighton. I believe, however, it would soon be no great rarity there if its food-plant 

 were cultivated in suitable localities. It is a very local insect, and seldom voluntarily flies far from its food- 

 plant, to which it is very destructive, the larva eating the unfolded leaves and flowers also burrowing into 

 the young pods. It only appears about Yokohama late in the year, at which time its food-plant is in bear- 

 ing, and as this is not much cultivated it is a scarce species there. 



51. Lycsena argiades, Pall. (Pi. 4, fig. 23A, 230.) 



L. hellotia, Men. 



Locality Yokohama. 



Tin.e of appearance March to October. 



This species is very abundant, and a succession of broods appears during the year ; they vary much 

 in size, and female specimens are often to be found with more or less blue on the upper side. 



52. Lycsena argia, Men. (Pi- 4, fig. 24A, 248.) 



L. japonica, Murray. (PI. 4, fig. 240.) 



Locality Yokohama. 



Time of appearance March to November. 



