XIII 



afterwards it became dark, brown or black. Hence an increase of black. 



In the case of the young larva of Hasora Badra Moore, the head of the 

 young larva is black ; afterwards it becomes blood-red with five black points. 

 Hence decrease of black ; five relic spots have been left and this even before 

 the red colour had paled. 



In the case of the larva of Hasora Myra Hew. the head is orange ; when it 

 is grown up, on each side a little black spot is to be seen ; but in the young 

 larva two more somewhat larger black spots. Therefore decrease of the black. 



The head of the young larva of Parnara Conjuncta Herr-Sch. seems to 

 be black with a little white, and, in its adult condition, white with not always 

 the same black relic-spots or streaks. Decrease of black. 



In the case of Padraona Dara Koll. the head of the young larva is black ; 

 afterwards it becomes gray, or clay-coloured with some dark marbling. 

 Decrease of the black pigment. 



The head of the young larva of Telicota Augias L. is black or dark brown, 

 afterwards it becomes lighter with a dark marbling of a greater or smaller 

 extent or intensity, sometimes also the head of the adult larva remains dark 

 brown. Decrease of black more or less developed in the different individuals. 



Thus, except in the first named case, where black seems to be on the 

 increase, we notice in all these cases a decrease of black; and probably 

 this is the general rule; all those spots and streakes, which give rise to such 

 peculiar head-markings, make on the connoisseur quite the impression of being 

 relics. The increase of a colour in the process of colour-evolution is as a rule 

 more equal; in the above named case of increase, it advances too, uniformly 

 over the entire surface. That in some larva-species the colour is sometimes 

 greatly different in different individuals, dit not escape van Deventer's notice 

 either {Archie f Java Suikcr Ltd. igo2) and hence, although not understanding 

 the cause of it, he represented many of those forms of coloration. Exactly the 

 same thing, indeed, we observe in the larvae of this family living in other 

 regions. Subsequent researches may still clear up much in this respect, but 

 the fact that the process of colour-evolution here stands out very clearly, is 

 indisputable, I think. The colour of the body of the larvae, indeed, has in 

 some species undergone an evolutional change, but not in such a striking 

 manner as is the case with the heads. Also as regards the nature of the 

 green colour of the head of some larvae, I wish to wait for further researches. 

 Evidently this green colour of the head is concolorous with the general colour 

 of the body, and although the green colour of larvae is sometimes formed 

 from yellow with the addition of some black pigment, it also very often arises 

 from other causes; in such cases then this ought first to be inquired into, 



