SS MR. G. T. BETHUNE-BAKER : A REVISION OF THE 



slightly outwards, the seventh angular spot well inwards and confluent with the long 

 eighth spot; submarginal row just traceable; a black spot at anal angle and between 

 the submedian and lower median nervules, over which are scattered thickly bright 

 metallic-blue scales which extend beyond the lower median nervule ; over these 

 metallic scales there is a dark edging, extending up to the internal nervure. 



2 . Upperside : both wings pale violet ; primaries with broadish blackish costa to 

 near end of cell, where it increases suddenly into the exceedingly broad apical aria ; 

 outer margin very broad ; secondaries with broad dark costa and decidedly less broad 

 outer margin. 



1 have before me three distinct forms of the female, viz. : — the type ; another form 

 from Penang, in which the colour is bright deep lustrous blue, not violet at all, with 

 quite typical males ; and a third form from Tenasserim, in which the colour is pale 

 lustrous silvery blue, but here many of the males are paler, bluer, somewhat silvery, 

 and more lustrous, approaching near to the colour of pastorella Doherty. The under- 

 side pattern of each is just the same, like the typical males. The species can only be 

 separated from epimuta by the presence of tails. The violet colour of the upper 

 surface distinguishes the males 'from any close allies, and also the pattern beneath, 

 especially the dislocated transverse band. 



Staudinger's species aricia is identical with the pale silvery-blue form from Burma, 

 showing the darker patch of scales, but less distinctly. The genitalia also help to 

 separate this species from epimuta, the clasps being less broad at the base and rounder 

 at the extremities ; the hooks in both are broadish and inclined to be spatulate, not 

 tapering narrower as is often the case (see PI. V. fig. 5). 



Aehopala epimuta Moore (nee Hewitson). (Plate II. fig. 9, 6 ; Plate V. figs. C 

 & Or?.) 

 Amblypodia epimuta Moore, Cat. Lep. E.I.C. p. 42 (1857). 

 Arhopala epimuta Drucc, P. Z. S. Lond. 1895, p. 593. 

 Arhopala antimuta de Niceville, Butt. India, vol. iii. p. 277 (1890). 

 Arhopala antimuta de Niceville and Martin, J. A. S. B. vol. lxiv. pt. 2, p. 469 (1895). 

 Arhopala epimuta Druce, P. Z. S. 1895, p. 593. 



Hab. Borneo Straits ; Perak ; Penang ; Mergui ; Tenasserim. 

 Expanse, 6 & ? , 44-46 mm. 



The species is an exceedingly close ally of atosia Hew. ; in fact, almost the only 

 character by which they can be separated is that Hewitson's species has tails and this 

 has none. This is the insect that de Niceville identified as antimuta Feld., the type 

 of which I have carefully examined, and I find that davisonii de N. is the antimuta of 

 Felder. It will be observed that it has an exactly similar distribution as atosia Hew. 

 I have specimens before me from each of the same localities. The genitalia of this 

 species are referred to in the description of A. atosia Hew. ; in both the penis is 



