13 



Bingham gives Colonel H. J. W. Barrow's observation of how this 

 butterfly, just as various ants do with their antennae, strokes aphides with its 

 fore-legs, causing them to secrete a sweet fluid, which it presumably sucks up ; 

 and he gives an enlarged illustration of it. 



W. J. Tjampea (i6o); Buitenzorg (265); Prayangan, vicinity of the Wijn- 

 koopsbay or Palabouan Ratou and the Sandbay or Tjiletou (± i 50) on the south 

 coast ; Province of Bantam. 



C. J. Bodjonegoro (258). 



E. J. Kedyry (64). 



This species does not seem to occur in the districts about the north coast; 

 at least in Batavia, a district which I particularly investigated, I never found 

 it, but in somewhat higher places it becomes common. It occurs both in 

 W. J. and in E. J. in two forms, one of which is larger than the other, and 

 in which, moreover, the relic-stripe in the d" is somewhat longer and broader, 

 which induces Fruhstorfer to distinguish the smaller kind as a separate species 

 under the name of Posidion. It is, however, apparently only due to a difference 

 in evolution ; the largest of which I possess only d, is the least advanced ; the 

 most we can say, therefore, is that there is a form Posidion. According to 

 Fruhstorfer there is a difference between the genitals of the d of both forms, 

 but, as discussed on p. xxxi of the Introduction, this occurs in other cases between 

 forms of the same species in a different stage of colour evolution, and does 

 not constitute a specific difference. Of the 9, I only know specimens which 

 correspond in size to the last form. The upperside is dark brown, the 

 relic-stripe is lighter and in the 9 does not form a stripe, but spreads out 

 into a lighter coloured patch. 



The underside is greyish, with a number of small brown stripes and dots. 



2. SuKA N. S. (PI. XIX, 12^, PI. XXVII, 181). 



To this species I reckon a 6 and a 9 in my possession which I regard 

 as a separate species, and therefore have given the name Suka, an abbreviation 

 of the name of the place where they were found, Sukabumi (± 600), in W. J. 

 The d which corresponds in size to the form Posidion of the former species, 

 resembles it strongly on the upperside too; and the 9, although larger than 

 my 9 of that species, also resembles it on the upperside — whether the relic- 

 stripe of this 9 spreads out in the same way, cannot be seen in my somewhat 

 damaged specimen. But the underside of this species is, in both sexes, chalk- 

 white, with only quite insignificant lines and dots upon it. This constitutes a 

 distinct difference with the other species, and shows that the two specimens 

 belong together as the two sexes of one species. 



