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



anal lube, which is slightly developed, preceded by two black spots, the middle one 

 being almost entirely covered with pale bluish-metallic scales, and the other two 

 broadly edged above in like manner; the submedian nervule is elongated, so as to 

 form a tooth making a second short inner tail. 



? . Upperside : both wings pale lustrous violet-blue, more violet in hue at the 

 outer edges ; primaries with rather broad brown costa and broader brown outer 

 margin ; secondaries with broad brown costa and less broad brown outer margin, 

 decreasing towards the anal angle. Underside just like that of the male, but without 

 the lilac suffusion in the secondaries. 



This is a very distinct species and may be at once recognised by its lustrous lilac-blue 

 above, and by its distinct markings below, especially its transverse band. Mr. Ilewitson 

 confused this species with agnis Feld. (which latter he correctly figures on pi. i. 

 figs. 6 & 7 of 111. Diuni. Lep.) ; he, however, figures his own species fairly well in the 

 first instance in the Cat. B. M. pi. hi. figs. 1G & 17, but the transverse band of the 

 primaries is not quite accurate ; the spots should be separate, and the two lowest spots 

 forming the lower portion of the band are quite distinct and far separated from the 

 upper five ; this, I believe, arises from the figure not being large enough, so that the 

 markings are cramped to get them all in. There should, however, be no difficulty 

 whatever in recognising at a glance this lovely insect. 



Arhopala achelous (Hewitson). 

 Amblypodia achelous Hewitson, Cat. Lye. B.M. p. 7. n. 30, pi. v. figs. 7, 8 <$ (1862); Druce, 



P. Z. S. Lond. 1873, p. 351. n. 13. 

 Narathura achelous Distant, llhop. Mala}', p. '271. n. 18, woodcut n. 82, <$ (1885). 

 Arhopala achelous tie Niceville, Butt. Ind. vol. iii. p. 218 (18'JO); Druce, P. Z. S. Loud. 1895, 

 p. 590. 



Hub. Singapore ; Borneo. 



Expanse, 6 & 2 , 4G mm. 



This species is very marked and should be recognised without difficulty, the spots 

 beneath are very dark and prominent and the pale purplish subcostal stripe is a 

 marked character. 



Arhotala havilandi Bethune-Baker. 

 Arhopala havilandi Bethune-Baker & Druce, P. Z. S. Lond. 189G, p. GG5, pi. xxx. figs. 8^,9 ? . 



flab. Kina Balu ; Borneo. 



Expanse, d & ? , 47-48 mm. 



I originally compared this species with aida de Niceville, but having more recently 

 seen a larger series of achelous Hewitson, I have no doubt the present is its proper 

 place : it may be easily separated by the deeper purplish blue of the upperside, and by 

 the quite uniform tone of the underside; it entirely lacks the pale subcostal streak 



