ZEPHTEUS. 



373 



both colour and markings. Oberthiir says of his diaynantina : " En dessus, 

 d'un vert dore brilliant avec bordure assez large noire." The brilliant golden 

 green can only apply to sniaragdhia, Bremer, or hrilliantiua, Staudinger*, 

 and does not at all express the colour of orientcdis, which is a pale bluish 

 green. The broad black marginal borders are certainly like those of Z. on'en- 

 talis, var. cognata, but if diamantina were really a form of orientalis, then 

 the broad black margins would have rendered the description of var. cognata 

 unnecessary. 



Dorries bred this species in Askold, and Graeser (Berl. ent. Zeit. 1888, 

 p. 72) says that the larvse are abundant in Amurland on Quercus mongolica. 

 The imago occurs in the middle of July. 



It is found in mountainous parts of Central Japan and Yesso in July and 

 August. I have also received specimens from Chang-yang, Central China. 



I should mention that in consequence of my absence from England at the 

 time my paper on the Butterflies of Japan and Corea was passing through 

 the press I was unable to check the distribution table, hence one or two 

 species, including Z. smaragdina, were erroneously included therein as 

 occurring in Corea. 



Zephyrus coruscans, sp. nov. (Plate XXVII. figs. 7 $ , 8 c? .) 



Male. Something similar in colour to Z. tctxila, var. japonica, but more brilliant ; the black borders 

 of all the wings are broader, especially on the primaries, where the band expands considerably 

 towards apex ; the tails are longer, and the angulation above them is more produced, giving 

 the appearance of a second short tail on each of the secondaries. Under surface darker than 

 that of japonica, but the markings are similar, the principal differences being the broader 

 and straighter white central bands on all the wings, that on the secondaries starts from a 

 point nearer the middle of the costa ; tho submarginal pair of lines arc wider apart, and the 

 outer one is bluish and diffuse ; there is a white spot towards the costa ufiar the base of 

 secondaries, and another linear one, edged with black, about the middle of abdominal 

 margin. 



Female. Deep fuliginous brown ; there are three orange spots on the disc separated by the second 



and third median nervules. Under surface as in the male. 

 Expanse, S 47-52 millim., f 46-50 millim. 



* Staudinger (Rom. sur Lep. iii. p. 130) states that hrilliantina is not separable from 

 smaracjdina on the upper surface, and that there are only very trifling differences on the under 

 surface. The larvae, however, are very distinct and easily distinguished : that of hrilliantbia 

 feeds on oak, and is copper-coloured, with a dark dorsal line, pale segmental divisions, and a pair 

 of oblique streaks on the back of each segment ; the larva of smaragdina feeds on cherry, and is 

 yellow, with very striking black spots on the first, fourth, and eleventh segments. 



3d 



