(i) 
the smallness of the yield and difficulties in breeding the 
maker render it more than unlikely that it will ever become of 
commercial importance.” 
CoNIOPTERYGID cocoons.—Mr. C. B. Wixuiams exhibited 
specimens of the cocoons of the three British Coniopterygidae : 
Coniopteryx tineiformis on a pine needle, Semidalis aleurodi- 
formis in a small depression in a hawthorn twig, and Conwentza 
psociformis on the under-side of holly leaves. The cocoon of the 
latter species is a double structure having an outer layer some 
distance above the small inside case which contains the pupa. 
In answer to a question by Mr. E. KE. Green, Mr. Williams 
replied that the larvae had eaten ova, particularly those of 
spiders, and also mites, and small scale insects. 
MIMICRY IN RELATION TO GEOGRAPHICAL DISTRIBUTION. 
—Dr. F. A. Drxey exhibited several boxes of Lepidoptera in 
illustration of the geographical relations of Mimicry, and 
remarked on them as follows :— 
The theory of Mimicry, like many other theories, is by no 
means so simple as it looks at first sight. I propose to restrict 
my remarks on this occasion to one aspect only of the question, 
viz. its relation to the facts of geographical distribution. 
It is well known to all entomologists that along with the 
striking resemblances between insects of different affinities 
which are considered to come under the head of Mimicry, there 
exists to a large extent a community of habitat. 
Take, for instance, the group of red, black and white Neo- 
tropical butterflies, allied to our English Swallowtail, of which 
Papilio nephalion, Godt., is a good example. This particular 
colour-scheme has representatives in each of the three sections 
into which the genus naturally falls; and the same scheme is 
adopted by a number of butterflies, such as Huterpe rosacea, 
Butl., which have nothing to do with the Swallowtails, but 
are nearly allied to our common garden whites. This par- 
ticular combination of colours is unknown except in Central 
and South America. 
So also the peculiar facies of the genus Mylothris, with the 
parallel series of forms presented by the very distinct genus 
Phrissura, belongs exclusively to the African Islands and 
Continent south of the Sahara. 
