_ 
XClv 
and in the black border of the hind-wing being intermediate 
in width between marshalli and doherty. 
The Nairobi doherty: on the average are appreciably larger 
than those from the higher levels from which it was originally 
described; they are also somewhat richer in tint, though the 
earlier specimens may have faded to some extent. 
The species is found generally in open park-like country 
with scattered trees. Its flight is not rapid, though hardly 
so leisurely as that of Danaida chrysippus L., or Acraea encedon 
L. It frequently settles on tree-trunks, from which it starts 
into flight somewhat suddenly and often evades the net in 
this way. Its appearance on the wing is decidedly brighter 
than that of A. encedon, and it appears somewhat more rosy 
on the wing. 
Danaida chrysippus is quite common at Nairobi, but 
A. encedon is not generally abundant there. In both species 
the dohertyi-like form without the black and white tip to the 
fore-wing is predominant. 
PAPILIO REX OBERTH., FROM Narropi.—The Rev. K. St. A. 
RoGERS also exhibited a case of Papilio rex males and female 
from Nairobi, together with the model Melinda formosa 
Godm. These specimens, coming from the Eastern limit of 
its range, may be regarded as typical. The males show a 
fair amount of variation, particularly as regards the basal 
fulvous of the fore-wing. It may be noticed that specimens 
of the model, two males and one female, were taken at the 
same place and on the same day as the mimics in the case 
of three of the males, and these are the actual specimens 
exhibited. 
The first male is quite typical and is an excellent mimic of 
the Melinda. , 
In the second male, which was captured on the same spot 
and within a few minutes of the Melinda, the basal fulvous 
on the fore-wing is much paler. As the specimen is fairly 
fresh it is improbable that this is due to fading. These were 
captured on Sept. 13, 1919. 
The third male departs more from the typical pattern. 
The basal fulvous is almost obsolete, and there is a conspicuous 
sickle-shaped mark below the cell. It will be observed that 
