310 Dr. Frederick A. Dixey on the 
poppea, Cram.* The peculiar facies of G. saba 2 seems 
to be most likely due to mimicry of Nyctemera apicalis, a 
protected moth. Those members of the group that have 
not been affected by mimicry retain few traces of the 
original ground-colour, and present very much the 
appearance of an ordinary male Appias (G. saba 6, G. 
castalia, etc.). 
The other species usually included under Belenois, 
besides differing im points of structuret from those just 
discussed, show as a rule a greater persistence of dark 
ground-colour. Both S and M are usually present in 
fair development, either separate or fused, and the 
discoidal patch on the forewings is generally well 
marked. 'The markings in sever al species show a strong 
resemblance to those of Synchloe hellica and S. johnstonii ; 
but notwithstanding this, I am disposed to think that 
Belenois proper really represents an offshoot of another 
part of the Old World Pierine stem, that, namely, re- 
presented by Delias and Prioneris. The distribution of 
dark and light ground-colour in such species as B 
mesentina right easily be derived from those of D. 
belladonna and D. ewcharis, and the underside of the 
hindwing in this and other forms of Belenois offers only 
slight modifications from that of D. belladonna. 8B. 
peristhene exhibits a curious resemblance on both sur- 
faces to D. nysa which may perhaps be due to mimicry, 
although the ranges of the two insects only coincide for a 
small part of their extent ; it is not improbably in any case 
an indication of real affinity. In neuration, those species of 
* T adopt Mr. Trimen’s unravelling of the strange confusion 
that surrounds the synonymy of rhodope, Fabr., and poppea, Cram. 
(South African Butterflies, vol. iii, p. 35, and note). The upshot 
no doubt is that a true Mylothris (Papilio poppea of Cramer 
according to Mr. Trimen) is closely copied by at least one Pierine 
of the “B” group of Phrissura (Papilio rhodope of Fabricius 
according to the same authority). I do not propose to embark 
upon the question further than to observe that the ‘‘Synonymic 
Catalogue” identifies the two, and that Mr. Trimen himself 
unfortunately speaks of rhodope in the text, when he must mean 
poppea (ibid. p. 35). 
+ Negatively by the absence of anal tufts, positively by the 
presence (in many) of anal hooks, also by the straight direction and 
greater relative length of the upper disco-cellular nervule in the 
forewing. In many species of this group, which we may designate 
Belenois proper, the first subcostal branch anastomoses with the 
costal. 
