C aii.) 
Instances or Mimicry, Protective REsEMBLANCE, &C., FROM 
THE Lagos District.—Mr. W. A. LamBorn, who was intro- 
duced by Prof. Poutron, had intended to show at this meeting 
the cases which he had exhibited at the Conversazione, but 
owing to a misunderstanding, they had not arrived. He 
made, however, the following observations :— 
“ Prof. Poulton’s account of the mimicry of certain Danaine 
butterflies by Euralias induces me to mention that I recently 
took at one sweep of my net two butterflies, an Amauris 
psyttalea, Plotz, and a Huralia dubia, which were flying round 
and round each other in a manner suggestive of courtship. 
Their movements on the wing were so active that I was 
unable to recognise them before capture, and it seemed to me 
evident that the one must have been deceived by the mimetic 
resemblance to its own species exhibited by the other. 
“In the exhibit which I had hoped to bring to your notice is 
a West African Hypsid moth determined by Prof. Poulton as 
Deilemera, probably antinori, Oberth., with the cocoon from 
which it emerged. The cocoon bears a large number of creamy 
white semi-transparent frothy spheres which bear a very 
strong resemblance to the cocoons of Braconid parasites. 
The cocoon was formed during the night by a larva in my 
possession, and it bore these structures when I first saw it. 
Their resemblance to the cocoons of the parasites was so 
marked that I did not make a very careful examination, and 
I did not discover their spuriousness till the moth came out. 
Prof. Poulton has since pointed out that the structures are 
very loosely heaped up on the cocoon, and that they are also 
noticeable on the silky material in the immediate neighbourhood 
of the cocoon, facts which tend to suggest still-more strongly 
that the structures are Braconid cocoons. ‘They doubtless 
have a protective function. A bird, for instance, would soon 
learn that a cocoon bearing the Braconid cocoons does not 
contain a pupa worth eating, and it is reasonable to suppose 
that it would likewise pass by a cocoon bearing structures 
which resemble them in such a remarkable way. 
‘“‘T have obtained some light on the relationship between 
the ‘brands’ or patches of peculiar scales on the wings of 
male Danainae and the double tuft of hairs which can: be’ 
