(ern) 
the band in the fore-wings ; in the presence in the same wings 
of a very smnall ochre-yellow apical spot, and of a similar spot 
close to the posterior angle on the upper-side ; and on the under- 
side the increase of the fuscous scaling about 2nd median 
nervule, so as almost to interrupt the yellow discal band. 
This made the fowrth pronounced known form of the 9 
Papilio merope. The usual and generally distributed form 
of this sex throughout Tropical Africa was that named [Hippo- 
coon, by Fabricius—an excellent mimic of Amawris niavius, L. ; 
all the other forms appeared to be very rare, and two of them 
—Dionysos, Doubl., and the form from Zanzibar described in 
Mr. Trimen’s Presidential Address to the Society on January 19, 
1898—were not direct mimics of any other butterflies, but were 
least divergent from the non-mimetic coloration and pattern 
of the male. The form which he now brought to notice was, 
on the contrary, a direct and unmistakable mimic of Planema 
pogget; and, as it was inconvenient to refer to the mimetic 
forms without assigning names to them, he proposed to style 
this form Planemoides. 
The Presipent congratulated Mr. TrimEn on the exhibit, 
and the special interest attaching to an interpretation of this 
remarkable form of the female merope. The Society would 
sympathize with the feelings of the author of the original 
discovery brought before the scientific world, more than 
thirty-five years ago, of the most remarkable of all examples 
of mimicry in Rhopalocera, that of merope and its allies, 
as he saw before him for the first time this mysterious 
form accompanied by its model. At the same time it was 
only just to a younger worker, who had been in great part 
guided by Mr. Trimen’s classical monographs, to point out 
that the interpretation so convincingly illustrated that evening 
had been made out last spring by Mr. 8. A. Neave, B.A., of 
Magdalen College, Oxford, who had just become a Fellow of 
their Society. Mr. Neave had exhibited this form of the 
female merope together with Planema poggei as its model at 
both soirées of the Royal Society in May and June, a time 
when Mr. Trimen’s absence from England unfortunately 
prevented him from seeing them. Mr. Neave had shown 
at the same time another most striking and interesting 
