ON NEW AND LITTLE-KNOWN BUTTERFLIES. 309 



margin, outwardly not reaching tbe patch of the same colour crowning 

 the black spot in the first median interspace ; a fine black anteciliary 

 line inwardly defined by a similar white line; cilia throughout 

 cinereous. Face white in front. Palpi white, the third joint 

 black. Eyes surrounded by a white line. Antenna black with very 

 small white annulations. Body blue above, whitish beneath. Legs 

 white, prominently ringed with black. 



On the upperside B. buto differs from the same sex of B. cleoboides, 

 Elwes, in the colour of the ground, being distinctly of a lighter shade 

 and emerald-green in some lights, instead of being of the same shade of 

 blue in all lights ; the blue area on the upperside of the forewing is 

 of considerable less extent, as will be at once observed by consulting 

 Mr. Elwes' excellent figure 5 of the female of B. cleoboides ; on 

 the underside of the forewing in B. cleoboides the discal band is straight 

 from the costa to the submedian fold, posterior to which it is directed 

 inwardly slightly, in B. buto it is distinctly outwardly curved, and 

 is, moreover, placed considerably nearer the outer margin ; on the 

 hindwing the black spot in the first median interspace is twice as 

 large, and the yellow area crowning that spot is well separated from 

 the yellow fascia placed interior to it, while in B. cleoboides these two 

 yellow areas are conjoined. There is a slight difference in outline also— 

 B. cleoboides is a more " chubby " or truncated insect, the costa of the 

 forewing being short, while the forewing of B. buto is more produced 

 at the apex, and the costa consequently longer. It has two subcostal 

 nervules only in the forewing. From the figure of " Iolaus" ister, 

 Hewitson, the present species may be known by the blue coloration of 

 the forewing on the upperside being of much less extent. 



Described from two examples in my collection, one each from 

 Tenasserim and N.-E. Sumatra. 



30. OHLIARIA AMABILXS, Martin, PI. P, Fig. 42, $. 



Habitat : N.-E. Sumatra; Java. 



Expanse : #, TO inch. 



Description: Male. Upperside, both wings rich dark ultramarine- 

 blue visible in all lights, but distinctly iridescent, so that the colour is 

 much brighter and more prominent in some lights than in others. 



