68 MR. G. T. BETHUNE-BAKER: A REVISION OP THE 



is very closely allied. It may be separated best by the underside pattern of the primaries, 

 the spots being decidedly less than in Felder's insect, which latter has also a different 

 transverse band beginning with quite a small spot on the costa, and the fifth and sixth 

 spot being much larger and shifted further inwards. The genitalia are similar to 

 those of dohertyi. but larger, with subtriangular clasps, and more slender penis which 

 has a long opening at the orifice. 



Arhopala pilenops Felder. (Plate I. fig. 27, 6 .) 

 Arhopala phanops Felder, Reise Novara, Lep. vol. ii. p. 227. n. 251 (1865). 



Ha b. Luzon "and Philippine Islands. 



Expanse, 6 & ? , 36-39 mm. 



This species is easily separable from adorea de Niceville, for it is very much smaller 

 in size and the transverse band of the underside is not dislocated, and it is altogether 

 more uniform in tone of colour. From sandakani mini it may be recognised by its 

 much duller and darker upper surface and by the broader margins ; beneath the colour 

 is darker, the pattern is slightly different and is also more uniform than is my species. 

 The figure will show at once the various points of difference. The genitalia are 

 similar to those of dohertyi in pattern, but with smaller clasps rounded at the lower 

 extremity but sharply angled at the upper extremity. 



Arhopala sandakani Bethune-Baker. 

 Arhopala sandakani Bethune-Baker & Druce, Proc. Zool. Soc. Lond. 1896, p. 671, pi. xxxi. fig. 2, <$ . 



Hob. Sandakan ; Java ; Silam ; Pulo Bai. 



Expanse, d 35-45. $ 42 mm. 



This species is easily separated from the following by its smaller size, narrower margins, 

 brighter and bluer colour, and by the darker tone of the undersides. Since describing 

 this species, Mr. Cator has taken many in Pulo Bai and one in Silam, Borneo. The geni- 

 talia are very similar to those of pluenops, but the hooks are slightly curved upwards. 



Arhopala qvjercoides (Rober). (Plate I. fig. 26, 6 .) 



Amblypodia quercoides Rober, Iris, vol. i. p. 72, Tat', v. fig. 9 (1886). 



Hab. Celebes. 



Expanse, <s & 2 , 37-42 mm. 



This is a common insect in Celebes : in the male the violaceous colour has in certain 

 lights a brown shimmer over it ; it may be readily recognised from its near allies by its 

 very much greyer under surface and very distinctly marked pattern and the unusually 

 even transverse band. The genitalia have oval extremities to their clasps, but are 

 otherwise similar to those of phcenops. 



