( viii ) 
Professor Povuntron also exhibited specimens of Drurya 
antimachus, together with the butterflies which he suggested 
as forming a group synaposematic with it. The central species 
appeared to be Acrxa egina, round which clustered a number 
of other species of the same genus so much alike as to be 
probably indistinguishable upon the wing. Examples of these 
were exhibited, viz. A. zetes, perenna, rogersi, and pharsalus. 
Another beautiful Papilionine member of the group, P. 
ridleyanus, was also shown. Its pattern, in both sexes, was 
nearest to that of the male A. egina. In fact, so close was 
the resemblance that Godart had been entirely misled by it, 
and had described the Papilio under the name of zdora as 
the female of Acrea egina. Myr. Roland Trimen, F.R.S., had 
recently called the speaker’s attention to this, and had in- 
formed him that the specimen of the Papilio in the Dufresne 
Collection at Edinburgh bears the MS. label “ zidora, fem., 
Egina, Cram.,”’ probably in Godart’s handwriting. Godart’s 
mistake had been recently pointed out by Mr. Perey H. 
Grimshaw, and Mr. Trimen had himself recognized it from 
Godart’s description, and had made a note of it in his copy 
of the work. 
An obvious Nymphaline member of the group was Psewd- 
acrea boisduvalii, the male, like the last-named Papilio, 
resembling most closely the male of Acrwa egina. It was the 
under-side of the female Psewdacreva which first suggested to 
the speaker the idea that antimachus was a member of the 
same group. While the upper-side of the Papilio seemed 
obviously mimetic of the male of Acrwxa egina, the under-side 
of its hind-wings possessed a remarkable and characteristic 
ochreous ground-colour distinguishing it from any other 
member of the group except the female Psewdacrexa, in which 
a distinct resemblance was manifest. That the approach has 
been from the side of the latter seemed clear on comparing the 
female of the western form with that of its south-eastern close 
ally Pseudacrea trimeni, in which no rac of this peculiar 
tint was to be found. Such deutero-synaposematic resemblance 
between these two mimics of the egina type of colouring and 
pattern had been doubtless encouraged by the fact that they 
were the two largest members of the whole group, the female 
