Mimetic Relationships in the genus Heliconius. 127 



a remarkable mimic of a species in Section II. An example 

 kindly lent me by Mr. Kaye is to some extent intermediate, 

 having in the fore-wing a white spot above the first median, 

 another below the first subcostal, whilst with a lens white 

 scales can be seen in several other positions. The under- 

 side of this specimen is very remarkable, since the dull 

 brown colour is paler all round the margin of the hind-wing 

 over an area corresponding exactly with that of the white 

 border in forms of cydno. Moreover, on the fore-wing the 

 discal area is paler, not over an area corresponding with 

 the white marks in weymeri, but representing the yellow 

 patch of cydno. 



We may now turn to heurippa. a nearly typical example 

 of which is shown at fig. 10. There is little or nothing 

 to associate it with cydno. Fig. 9, however, shows the 

 fore- wing of lieurippa with the cydno band in the hind- 

 wing. This is the form known as ivernickei, Stgr., and 

 there is a somewhat similar form, emilius, Weym., which 

 lias the hind-wing band slightly suffused with grey as in 

 some forms of cydno. These facts would seem remarkable 

 enough, but there is further and stronger evidence. My 

 figs. 10, 11, and 12 show a regular gradation of pattern, 

 ending in the form at fig. 12, which is very near the stage 

 of having nothing but a red patch on the fore-wing. Now 

 this specimen, which is in the Tring Museum, has on the 

 underside (fig. 13) the "ghost" of the pattern of the 

 cydno underside. The delicacy of the shades of brown is 

 difficult to reproduce, but the beauty of the actual speci- 

 men is very striking, and I am certain that no one could 

 see it without being convinced of the specific identity of 

 cydno and heurippa. The specimen shown at fig. 11 is 

 also remarkable from the fact that on the underside of 

 the hind-wing there is a pale horizontal band exactly 

 corresponding to the yellow horizontal band of weymeri. 



At fig. 16 is a figure of a form of nielpomene which does 

 not quite correspond with any of those named in the 

 monograph already referred to. The fore-wing has the 

 bicoloured patch of heurippa, but in other respects the 

 example resembles mdpomene amandus, shown a.t fig. 17. 

 This form approaches nanna bun-held, but has more 

 red in the cell. H. melponu me amandus, fig. 17, connects 

 nanna with heurippa, and through the latter with cydno. 

 K;-_ r . 18 is amaryUis rosvna, which is merely a form of 

 melpoHienr with the hind-wing yellow hand, whilst fig. 1 ( .> 



