GOO Mr. J, C, Moultoii on some of the ^^rf/ict^mZ Mimetic 



appearance consists of a very dark ground colour crossed 

 by a broad black-spotted band of orange-tawny, from the 

 centre of the costa to the anal angle of the fore-wingr and 

 apex of the hind. Although a very strong general Hke- 

 ness runs through the whole combination, there are also 

 close resemblances between special members, as for instance 

 the large Helieonius aristiona (Figs. 6 and 7), which evi- 

 dently follows Melinssa mothone (Figs. 1 and 2). The spots 

 in the oblique band are superficially alike, while in both 

 species there is very little orange-tawny colour at the apex 

 of the hind-wing. 



Another special internal association is formed by Hypo- 

 scadafallax (Fig 3) and Eresia murena, probably a southern 

 form of B. ithomiola, Salv. Here the spots in the band 

 are only two in number, both faithfully reproduced in 

 murena. Again, as regards the orange-tawny area at the 

 apical region of the hind-wing, the Ithomiine is followed 

 by the Eresia. Eresia murena is not represented on Plate 

 XXXITI ; and the two forms of Eresia ithomiola ^ there 

 figured are not such close mimics of H. fallax. It will be 

 seen by a glance at figures 12 and 18 on Plate XXXTII 

 that the outer margin of the oblique tawny band becomes 

 pale, due to the appearance of a yellow tint in these two 

 Eresias, which on that account must be specially associated 

 with the Fapilio {Y\g^. 16 and 17), and moth (Figs. 18 and 

 19), considered on p. 601. 



The Protogohius (Fig. 14) and the Papilio (Fig. 16) are 

 rougher in their resemblance, and perhaps tend towards 

 the HclieoivUifB and especially the Eueides (Fig. 8), rather 

 than the Ithomiinm (Figs. 1-5). 



An interesting feature of this Protogonius is the absence 

 of white spots in the hind margin of the hind-wing. The 

 reason is probably to be found in the absence of a Lyeorea, 

 from this association. These spots may be considered as 

 ancestral in the Protogonius — faint traces of them can still 

 be detected even in P. semifulvus — and the presence of a 

 similarly-spotted Lyeorea in the associations tends towards 

 their retention by the Nymphaline. In" this combination 

 (IV), however, in the absence of a Lyeorea, the Protogoimis 

 loses its marginal spots and enters more closely than usual 

 into the general mimetic association. 



Professor Poulton has also pointed out to me that in 

 Bolivian specimens of Mechanitis deceptus, small white sub- 

 marginal spots are retained in the sub-apical region of the 



