( 3 ) 



band of blue spots in the fore-wing has also been transformed 

 into white. These changes, with the exception of that last 

 mentioned, produce a rough mimetic likeness to Euploea 

 goudoti, as may be seen in Colonel Manders' beautiful plate 

 (Trans. Ent. Soc. Lond., 1907, PI. xxix, figs. 6a and 1). It 

 is evident from Colonel Manders' account (1. c, p. 451) that 

 the resemblance which appears to be so slight in the cabinet is 

 much enhanced by the mode of flight, and the fact that Papilio 

 and Ewplcea inhabit the same localities. Nevertheless it is 

 impossible to be satisfied with the simple conclusion that the 

 female phorhanta has gained its present pattern under the sole 

 influence of Euploea goudoti as we now know it in Bourbon. 



The ancestral submarginal blue spots of the hind-wing of 

 the male phofrhmita are already somewhat larger than the white 

 spots occupying a similar position in Euploea goudoti. The 

 blue spots transformed to white cannot therefore have under- 

 gone a further increase in size in the female under the 

 influence of the existing Exq^lota. Nor is it possible to 

 account by the same influence for the submarginal white spots 

 of the fore-wing of phorhania \ for Colonel Manders (1. c, p. 435) 

 only knows of a single specimen of goudoti " with faint bvit 

 decided indications of a submarginal row " in the fore-wing. 

 It is obvious that the present pattern of the Bourbon Euploe,a 

 eannot afford us the interpretation of the change which has 

 occurred in the female Papilio. 



If the upper-surface pattern of the female p)horhanta, fig. 6a, 

 on Colonel Manders' plate, be compared with that of Scdamis 

 augustina, fig. 3, and Euploea goudoti, fig. 1, it will at once be 

 seen that the Papilio bears a far closer resemblance to the 

 Nymphaline than to the Euplceine. Now the upper-surface of 

 the Scdamis is a fair mimic of the Mauritian Eu^jlcea eupJtone, as 

 was pointed out by Mr. Eoland Trimen, F.E.S., in 1866: — "In 

 spite of the very different outline of wings, the general 



coloration of this butterfly bears considerable resemblance to 

 that of Euploea euphone, and I can well imagine its escaping 

 notice if flying in company Avith the latter species " (Trans. 

 Ent. Soc. Lond., 1866, p. 335). 



We are therefore led to the conclusion that phorhanta has 



