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chief role here, being doubtless nothing else. In the next species and amongst 

 EuPLOEAS this peculiar development of the white, although in the latter genus 

 it manifests itself in a somewhat different manner, arises from the same cause. 

 The material in my possession has not been labelled with sufficient care, as 

 regards locality and period of capture, to enable a definite judgment to be 

 formed in this connection. Two types, one darker and larger (SEinENTRioNis) 

 and one exhibiting more white (Melissa) are clearly separable in Java. At 

 Batavia, where I collected during an extensive period, I found, both in the 

 wet and the dry season, exclusivel)^ butterflies of the Melissa type, a specially 

 large and fine specimen even in August, therefore at the height of the dry 

 season ; in the Preanger mountains, however, I invariably took specimens of 

 the Septentrionis form. At the same time I also possess a specimen of 

 the Melissa form from Tjampea (i6o) and one supposed to have been captured 

 on Mount Karang, prov. Bantam, together with one from Touban which evidently 

 forms a transition to the other type. Moreover, the Melissa specimens are 

 not constant as regards the white streaks and spots and frequendy show trans- 

 itions to Septentrionis; the white lines in specimens of the latter are very 

 unequal in width, the white in this form being of a bluish shade. 



From Banyouwangy I received a specimen of the form Septentrionis, most 

 probably not taken in the mountains, and from Besouky, also from the low 

 lying districts, a specimen which, according to Snellen, mostly agrees with 

 the form described by Butler from the Samoa Islands under the name of 

 Obscurata. From Jokjokarta and from Semarang, on the north coast, of 

 C. J., I possess specimens which, without a doubt, belong to the form Melissa 

 and agree with it in size but which at the same time are much darker than 

 others from W. J. and in this respect, therefore, again approach Septentrionis. 

 Of the earlier stages nothing is known to me personally. Martin observed 

 oviposition of Septentrionis. A single egg was deposited on each leaf and 

 affixed by the truncated end, in a similar manner as was observed by me in 

 the case of Euploea Midamus L. and E. Rafflesi Moore and recorded by 

 Macpherson of a species of Hest:a. The egg was hatched on the third day 

 while the larva 8 or 9 days after turned into a pupa of a shining green with 

 golden spots and a gold band at the boundary of thorax and abdomen. On 

 the eighth day the imago emerged. 



Moore gives the life history of the larva and pupa as it was observed on 

 the continent of India by Dr. Forsayeth. According to him the larva lives 

 on Asclepias, Calotropis, and Hoya. To judge from his figure it strongly 

 resembles that of D. Chryslppus but the median pair of processes is absent; 

 the pupa also appears to be of the same type as in that species but is larger. 



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