ett) 
of the basal patch streaming outwards in the 5th interspace 
(between veins 5 and 6). This feature, also commonly found 
in cenea, planemoides and other forms, is very faintly indicated 
in 48, and barely visible in the Unyori example. 
I select as the type specimen 48 in the Hope Department, 
Oxford University Museum, choosing it rather than 36, 
because of the deeper tint of the hind-wing patch. This tint 
is also found in the Unyori specimen, and is probably more 
typical of the Jezghi form than the much paler shade of 36. 
In addition to the individual differences between these 
three specimens described above it may be added that the 
spot in the cell is undivided in 36, but divided in the other 
two, the detached extremity being nearly obsolete in the Unyori 
(Nyangori) example. The submarginal spot (a) is wanting 
from 48 (although present on the under surface), but not 
from either of the other specimens. The apical spot (6) is 
well developed in all. 
The planemoides form is entirely unknown in Natal, and 
indeed in areas far to the north of it, and hence it is im- 
possible to adopt the plausible interpretation of leighi as a 
hybrid between cenea and a male bearing the planemoides 
tendency, or vice versa. We are therefore driven to the 
hypothesis that the /ezghi form is a persistent definite stage 
in the evolution of planemoides. 
My friend Mr. Roland Trimen. F.R.S., has kindly sent me 
(August 14, 1911) the following account of three specimens 
in his collection which possess the leighi pattern, but differ in 
the uniform ochreous tint of all the markings :— 
“As regards the curious form of ? P. dardanus you write 
about, which Leigh has sent from Natal, and which you say is 
really the same as the one you figured in Trans. Ent. Soc., 1906, 
Pl. XX, f. 1, from N.E. of Victoria Nyanza, I have been look- 
ing up my lot of the 8. African sub-species, and find 3 examples 
which approximate your fig. 1. The first and second of these 
you will find noted in my “S. Afr. Butt.,” iii, p. 249 (under 
‘‘B.h.” in the text), and treated there as linking hippocoon 
and trophonius; the St. Lucia Bay example was taken by 
Col. H. Tower in 1867, and the Delagoa Bay one by Mrs. 
Monteiro in 1883. The third was captured at Morakwen. 
