« ( Ixxxiii ) 



" Asphalia ridens. — The continental form is generally almost 

 unicolorous ; the conspicuous frosted markings of the English 

 form are nearly always absent." 



Dr. F. A. DixEY exhibited specimens of Ixias baliensis, 

 Fruhst., and Ilufliina corva, Wallace, remarking upon them as 

 follows : — 



" Some short while since, a few Pierine butterflies from the 

 Island of Bali, which formed part of a collection kindly 

 presented to the Hope Department by their captor, Mr. E. 

 Shelford, were put into my hands for incorporation with the 

 general series. The butterflies when they reached me had 

 been set up, and, as was supposed, had been sorted into 

 species. Among a somewhat worn series of the Malayan 

 form (//. corva, Wallace), of Ilupkina 7ierissa, Fabr., one female 

 caught my eye as being in rather better condition than the 

 rest. On being examined more closely, it was seen to be not 

 a HupMna at all, but an Ixias ; a genus, as I need hardly say, 

 of very different affinities. The specimen is, in fact, a female 

 of the Bali form of Ixias reinwardtii, Voll. ; the form which 

 has been called baliensis by Fruhstorfer. It is quite near 

 enough in appearance to the Hupldnas with which it was 

 caught to pass muster easily on a casual view ; and, as has 

 been seen, it did actually delude one human observer. 



" There can, I think, be little doubt that this resemblance 

 is significant. The usual aspect of Ixias is rather widely 

 departed from by both sexes of /. reinwardtii and its immediate 

 allies, but, as so often is the case, the mimetic approach to 

 another genus is confined to the female. Through the kind- 

 ness of Professor Poulton I am able to exhibit a male example 

 of Ixias baliensis which is especially interesting as being one 

 of the actual specimens caught by Mr. Wallace during his 

 memorable visit to the Malay Archipelago. It will be seen 

 that the male has no share in the mimetic garb of his mate. 



" It is noticeable that the appearance of these specimens of 

 H. corva from Bali differs from that of ordinary examples of 

 H. nerissa in the fact that the hind-wing of both sexes shows 

 a rather pronounced dark border ; this in the female being 

 brought about by an almost complete fusion of the submarginal 

 row of dark spots, commonly found in that sex of the species, 



