W. J. Batavia (3 — 14) ; Tjampea (160) ; Buitenzorg (265) ; Prayangan mts. 

 (1500); Nousa Kambangan (20) Jacobson). 



C. J. Bodjonegoro (258). 



E. J. Jember (98) province of Besouky ; Kedyry (64) Tengger mts. (± 700) 

 (Fruhstorfer). 



Fruhstorfer considers that the variety from the Tengger mts. may be 

 distinguished under the name of Perlucidus. I have not hat the opportunity 

 of comparing it sufficiently with the others. 



The eyes of this species are Hght green when alive. The butterfly is 

 very common, and settles by preference in shading places. As it seems to me, 

 they are only seen flying when they have been disturbed for some reason, 

 while they then shudding settle again. In this respect they behave exactly like 

 Cyllo Leda L. and similar twilight butterflies, and I should therefore not be 

 surprised if they had to be included amongst these. 



In this species the darkening process of colour evolution, which, as explained 

 in the Introduction, appears so characteristically in some Gerydinae, can be 

 observed most distinctly. In order to facilitate observation, the specimens of 

 this species may be divided into groups, according as they are individually 

 advanced In the process, that is, according as the original white colour is more 

 or less concealed by dark scales. As, however, the process in question develops 

 independendy in each individual, the groups are naturally not sharply divided, 

 but merge into one another. 



The first form 8a is that of the females, which are apparently much less 

 far advanced in the process in question than the males, showing thus the oldest 

 of the forms, and as such, greatly resembling Miletus Zinckeni Felder, 

 a nearly related species, in which the old form is still better preserved, and 

 that in both sexes, and which therefore shows the colour scheme of the original 

 general stock form of both species even more plainly, unless, which is also not 

 impossible, M. Symethus Cram, is differentiated from M. Zinckeni. I possess, 

 of this Symethus form, 2 1 specimens, captured in the wet and in the dry season 

 in Batavia and in other districts of W. Java, as well as two from E. Java, one 

 from the mountain Semarou (750) and one from the Tengger mts. (700); all 

 showing no more than individual differences. The white on the upperside of 

 the primaries is, in some specimens, still much the same as in M. Zinciceni 

 Felder, but usually towards the posterior edge more or less eaten away as it 

 were especially in the under part, so that there it ends in two points. The upper- 

 side of the secondaries is sometimes darker, and sometimes lighter, the white 

 stripe, although in some cases light and in others heavier, is always quite 



