20 Euploeines forming Mimetic Groups 



Although there is no resemblance between this Danaine and any 

 other Key Island butterfly, it is interesting as exhibiting an increase of 

 white coloration. 



B— ARU ISLANDS GROUP. (Plate Ib.) 



The forms found on these Islands show on the whole a darker 

 coloration than those of Key. A white-banded combination exists, but 

 the individuals composing it are not common. Probably these forms 

 centre around the white Taenaris catops Westw. (fig. 6), of which 215 

 specimens were sent, the presence of Danais affinis Fbr., of which 90 

 specimens were sent, being also a contributory factor. 



The following forms composing this group were collected from 

 January to May : — 



Danais ajfinis Fbr. Ninety specimens. This does not resemble the 

 next three in pattern. 



Euploea alimena vicina Feld. (figs. 1, 2) 3 ? . 



E. confusi grayi Feld. ? f. nov. (fig. 3). One specimen of this very 

 remarkable form. 



Elymnias agondas aruanaFi-uh. 2 . Light form: twenty specimens, 

 fig. 4. Dark form: twenty-five specimens, fig. 5. 



The Elymnias 2 light form, and the Euploea grayi ? , are probably 

 associated with Taenaris catops West., of which 215 specimens were 

 sent. 



In association with this we have the white $ form onesimus Hew. 

 of Papilio aegeus ormenus Guer ; of this ten specimens were sent and 

 twenty-six of another form allied to leporina Jord., in which the discal 

 patch of the hind wing is smaller than in any other form of $ . 



The ? Hypolimnas alimena is represented on Aru by a form more 

 typical of those occurring in most other localities. The white-margined 

 hind wing is only seen in Key and Tenimber specimens, but the 

 tendency is exhibited in Moluccan individuals. It is true that Felder 

 figured a form (Eeise Nov. p. 414, t. 55, figs. 5, 6) which he described 

 from Aru from a specimen identical with the Key Island form, but 

 we have not received one like it from Aru, and neither have we seen 

 another similar specimen known to have come from there. We have 

 one specimen with a very pale-margined hind wing and a pale brown 

 margin to the fore wing ; this is quite similar to the form found on 

 Banda. It is certain that Felder's polymena is not typical of Aru 

 specimens, 



