D A N A I D A E. 



Genus EUPLOEA F. 



EuPLOEAs are slowly hovering, not high-flying, butterflies settling on flowers 

 and seeking mostly shady places, some, such as E. Leucostictos Gmel., frequently 

 entering dwellings. They are met with, moreover, both in the plains and in 

 the mountains, being found even at an altitude of 2000 M. ; some species 

 occur everywhere while others are restricted to definite areas, which may probably 

 depend on the presence of the food plant. Among Euploeas also some speci- 

 mens are considerably smaller than others. According to Moore they belong 

 in Ceylon to the migratory butterflies. An observation made in December 1885 

 by Mr. T. Ottolander — already communicated by me some time ago — 

 is to the effect that in the province of Besouki, Eastern Java, he witnessed the 

 migrating of Euploea Leucostictos Gmel. on several days between 8 and 12 

 o'clock in the forenoon when the sun shone but no high wind prevailed. 

 Mr. G. A. ScHOUTEN likewise noticed the migrating of two species of Euploea at 

 the same period near the lake Ranau, in the province of Palembang, in Sumatra. 

 I have never myself observed the migrating of Euploeas in Java, although, at 

 the places in that island where I resided, Euploea leucosticos Gmel. was very 

 common ; nor have I received any confirmation of the fact from any other 

 observers and I do not deny that to my mind this renders the accuracy of these 

 observations somewhat doubtful. May it not have been that these Euploeas 

 simply happened ,to be particularly numerous at these spots without, however, 

 all flying in the same direction, a process characteristic of the phenomenon 

 usually indicated by the term " migration " } 



The (5, on being taken in the hand, protrudes its genitalia in the form of 

 long yellow processes. I have never noticed them, however, to emit by this 

 means the strong scent which Dr. Fritz Muller states to have observed in 



