NEW TNDO-MALAYAN BUTTERFLIES. 331 



patch of grey also in the interno-median interspace, sharply inwardly 

 defined opposite the origin of the first median nervule by the waved 

 outer margin of the patch of the ground-colour which occupies the 

 basal half of the interno-median interspace ; the usual three increasing 

 spots in the discoidal cell, a spot at the base of the first median inter- 

 space, a discal band of five spots, the upper three of equal size, in one 

 straight line, the lower two a little larger, increasing, slightly shifted 

 inwardly; a well-marked distinct submarginal series of six quadrate 

 spots, each spot defined on both sides with whitish. Hindwing with 

 the four anterior basal spots very prominent, the discal spots and bands 

 as usual, a well-marked submarginal series of five spots, followed by 

 three jet-black spots broadly crowned with rich metallic green scales. 

 This is a very beautiful and distinct species, startlingly like A , 

 diardi on the upperside, but like no species with which I am acquainted 

 on the underside. The absence of any costal spots on the forewing 

 allies it to 4. ace, mihi, to A. ate, Hewitson, and to figs. 29 and 30 

 of A. adatha, Hewitson, but the purple glossing of the underside will 

 instantly distinguish it from all these species, but apparently allies 

 it to A. achelous, Hewitson (a species I have not seen) ; the latter, 

 however, has three costal spots to the forewing on the underside. 



Described from a single specimen from Perak kindly presented to 

 me by Mr. J. Wray, Jr. 



8. ARHOPALA ARCA, n. sp., PI. H, Fig. 15, $ . 



Habitat : Celebes, 



Expanse : ? , 1'9 inches. 



DfiSCfiiPTiON : Female. Upperside, both ivings shining purplish- 

 fuscous, bronzy in some lights. Forewing with the discoidal cell 

 entirely light non-iridescent blue, two similar narrow streaks in the 

 median interspaces reaching half-way to the margin, and the area 

 behind the discoidal cell as far as the inner margin of the same 

 colour, filling the basal half of the interspace. Cilia anteriorly 

 fuscous, posteriorly from the first median nervule white. Hindiving 

 with the discoidal cell and the area immediately around it blue ; 

 with three tails, all tipped with white, the one at the termination of 

 the first median nervule long, the others, one on each side of the 

 long tail, short. Cilia white. Underside, hath wings creamy-white. 



