MIMICRY IN EAST AFRICAN BUTTERFLIES 89 
sippus are seen to be fully supported by this great black and 
white association. The mimetic series is centred round the 
abundant and highly distasteful Daniadae, but there are a 
number of other species of more or less similar patterns, which 
have a tendency to fall into groups amongst themselves, and 
are united into a single large and highly complex association. 
Besides the black and white species of Amauris, there are 
two other species which resemble each other so closely that 
they have only recently been properly differentiated by minute 
but definite structural differences. These are Amauris echeria 
and A. albimaculata. They are very abundant in many parts 
of the country, but do not occur in the coast district so far as 
is known at present. For our purpose these may be regarded 
as a single model. Here again we have a mimic of the genus 
Euralia, i.e. E. mima, which there is some reason to suspect 
may prove to be a dimorphic form of E. wahlbergi. This 
species I have never met with, but it is probably not uncommon 
in some places. The most interesting mimics, however, are 
those of the great genus Papilio. In the first place we have 
yet another form of Papilio dardanus known as the form Cenea, 
which is probably common at Nairobi. 
There can be no question that these very distinct females 
of Papilio dardanus are all one species, for they have all been 
bred from the same female by Mr. G. F. Leigh at Durban, 
and it would be a most fascinating study to breed them through 
at Nairobi, where other mimetic forms are known to be present 
and where some very interesting and primitive females have 
been taken from time to time. The food plant in South Africa 
is Vepris lanceolata, and there is probably a nearly allied plant 
in British East Africa, even if this species does not prove to be 
found. The result of such an experiment would well repay 
the labour involved, and all the offspring should be kept. I may 
say that Professor Poulton is very anxious to get this done, 
and he would be more than pleased to receive whole bred 
families and would give them a place in the Museum at Oxford 
where they would always be kept together. 
In addition to Papilio dardanus there are two other species 
of this genus which mimic Amauris albimaculata. These are 
P. echerioides and P. jacksoni. They are closely allied but 
