( Ixxii ) 
lasti, Gr. Smith, 3; Pinacopteryx sp. (allied to P. vidua, Butl.), 
9; Belenois sp. (allied to B. zochalia, Boisd.), 2? . 
XVI. Like XV, but with hind-wings ochreous or brownish- 
yellow. J. trimenia,?; P. lasti,? ; P. pigea, Boisd., 2 ; Bele- 
nois sp. (allied to B. zochalia), 9; B. zochalia, 9; L. 
thalassina, 2 . 
Dr. Drxry further remarked that though attention had 
already been drawn to several of these cases of resemblance 
by Mr. Trimen, Prof. Poulton, Mr. Neave and others, as well 
as by himself, they had not before been shown together in one 
view. In some instances the superficial resemblances between 
insects of very different genera belonging to this series had 
led to much confusion in the nomenclature, for an example of 
which he would refer to the facts given in Mr. Trimen’s 
“South African Butterflies,’ Vol. ili, 1889, p. 35 and note. 
The five genera now shown, though all belonging to the 
Pierinx, were not closely related ; Pinacopteryx and Belenois 
probably stood nearest to one another in point of affinity, but 
were still abundantly distinct. J/ylothris occupied an isolated 
position, while Phrisswra was allied to the Eastern genera 
Tachyris, Catophaga and Appias. Leuceronia was widely 
removed from all the rest. Hence there was little or nothing 
to support the suggestion that these likenesses might be 
merely the consequence of affinity. 
It was worthy of note that some form of the genus Mylothris 
was usually to be found at the centre, so to speak, of each of 
these different colowr-assemblages. But this was not invari- 
ably the case, and it not infrequently happened that the 
species of other genera showed a closer resemblance to each 
other than either of them did to the Mylothris. This was 
perhaps especially the case as between the two genera elenois 
and Pinacopteryx, but striking instances also occurred between 
Phrissura phaola g and Belenois theuszi d, and between Phris- 
sura isokani 2? and the female of a Lelenois allied to B. thysa. 
It was a further point of interest that the streaky character of 
the dark margin of the wings, well seen in M. poppea,?, 
appeared to have originated not in that genus, but in the 
genera Phrissura and Belenois. Its adoption by Mylothris, 
which was on all hands admitted to be a distasteful genus, 
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