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West Java specimens which merely differ in the darlt ochreous yellow margin 

 on the under side of the wings and which he called Sudra. Fruhstorfer, 

 however, is of opinion that two species have been mixed up by Felder and 

 he distinguishes these as Sudra and Nala, but bases them on alleged characters 

 which in no wise accord with the differentiating characters given by Felder 

 and to which in any case the latter's names have unjustly been applied, giving 

 rise to confusion. Fruhstorfer includes in his Sudra the form with the dark 

 ochreous yellow on the under side, as well as the other form described by 

 Felder; he designates as Nala some c? individuals found by him particularly 

 in E. J. which differ principally in having a black shining scent spot on the 

 upper side of the forevvings, while in addition several small faint ocelli occur 

 on the under side in the margin of the fore-wings, whereas in Sudra only 

 two such ocelli are present which, however, are larger. Females in which 

 several small faint ocelli also occur on the under side of the fore-wings, he 

 regards as the other sex of this species. Such specimens do, indeed, occur 

 and the difference in the ocelli appears to be fairly constant ; this character 

 is, nevertheless, not of great value. As regards the development of the ocelli 

 in the margin of the under side of the wings, considerable individual difference 

 exists in many species of Mycalesis ; and this is the case in the present one — 

 I here add an illustration (PI. XVII, fig. ^06) of a specimen from the Tengger 

 mountains in E. J., in which these ocelli are considerably larger than usual — 

 and in these circumstances I consider it too bold to assume specific distinction 

 merely on account of such difference in the ocelli. The presence or absence 

 of the forementioned scent spot is in quite another category and if this distinction 

 were sufficiently confirmed I would not hesitate to admit specific difference on 

 this ground. But this is not the case. Mr. Fruhstorfer was good enough 

 to let me have such a c? specimen and Mr. R. van Eecke, Assistant — princi- 

 pally concerned with Lepidoptera — at the Natural History Museum of Leiden, 

 who is an expert microscopist besides, had the kindne.ss to examine this black 

 spot for me. He found, in fact, some scent scales distributed in these spots 

 but they were likewise observed on the upper side of the forewings in the other 

 Nala males which are without the black spot, so that the scent scales have 

 actually no connection with the said black spot which, therefore, is not entitled 

 to the term scent spot. It appears to consist principally of the ordinary, but very 

 dark pigmented, scales, agreeing in this respect with similar black spots, as occur 

 for instance in some specimens of C. Leda L. (c/'. pi. XV, fig. 300), and these are 

 simply relics of a former particularly intense development of the black pigment at 

 the place where only after a long period this has spread over an obstinate spot. 



