28 



is not rare. From Batavia I possess only one such specimen but in the 

 Leyden museum there are many, caught at Tjimahi in W. J. (Prajangan). 

 For the rest I found in W. J. only the above-mentioned transitions. This 

 same way of getting paler appears also strongly in the already mentioned 

 related species T. Descombesi Bsd. 



As to the 9 the upper-side has no white as in the cf but yellow and the 

 black on it has extended a good deal, so as to occupy a great part of the 

 fore-wings. This black there is in a stage of evolutional accretion, so that in 

 the specimens which, in this respect, are most advanced, there remains of the 

 yellow only a small part near the basis of the wing. The yellow on the con- 

 trary is in the stage of evolutional paling ; in the specimens which represent 

 still the oldest stage of colour, and which for this reason have been taken for 

 9 of Belisar and have been figured by Grose Smith as $ of the form 

 Nakula, some orange is still found but it is turning paler into yellow, further 

 into yellow whitish and at last into white. All these transitions exist. From 

 Bali also I saw in the Martin collection just mentioned, 9 whose yellow on 

 both sides was very dark. In the afore mentioned specimens which have 

 advanced furthest in the process of colour-evolution, the under-side has conse- 

 quently turned paler (PI. II, fig. 40) in the same manner as in the 9 of the 

 form Nakula-Vestalina. In all Belisama's, except in those in which the said 

 process has proceeded very far, one sees on the fore-wings at the extremity 

 of the discoidal cell, a yellow or white double spot, visible sometimes on both 

 sides, generally, however, only on the under-side, and occasionally very distinctly, 

 but sometimes also hardly perceptible. In reality this spot is nothing but one 

 of the above mentioned persistent spots where, by influences still unknown to 

 us, the colour-evolution has been temporarily prevented, and where therefore 

 in this case the accretion of the black cannot take place, but where the old 

 colour still remains, though gradually growing paler into white also and in the 

 meantime becoming entirely surrounded by the black. Later on only does this 

 opposition seem to cease, and then the black covers also those spots. So in the 

 oldest form of the 9-— the one in which they have been taken for those of 

 Belisar — this spot is, of course, most strongly developed; it is however, in- 

 correct to see in this a characteristic of race or species, as Staudinger does. 



The caterpillar feeds on leaves of the same plant, on which also the larva 

 of T. Egialea Cram, lives, and perhaps also on those of other kinds of 

 Loranthus; that it lives also on Dioscorea, as Horsfield mentions, must be 

 a mistake. I found the larva and the pupa sometimes with those of T. Egialea 

 Cram, and of T. Hyparete L. on the same leaf. The caterpillar is pale green 

 with a black head, black spiracles and fore-legs and with long yellow or white 



