216 Mr. S. A. Neave: some bionomic 
common, and formosa does not seem to occur. There is, 
strange to say, not a single 2 amongst all the specimens 
of mercedonia and only four of formosa. 
The specimens of Papilio rex, eight $f and two ¢ , 
in the Wiggins and Harrison collections all come from 
Nyangori, and are very remarkable. Only two ¢f are 
fairly typical vex; the other specimens especially the 9 ? 
are markedly intermediate between P. rex and f 
mimeticus, Rothsch. The latter species, 1t will be remem- 
bered, bears a strong resemblance to J/. mercedonia. The 
intermediate characters are shown in the reduction in size 
of the spots, and in the extension of red-brown colour over 
the hind wings. 
This fact becomes of great importance when we recollect, 
that normal specimens of P. rex occur on the Kikuyu 
escarpment to the east, while the only specimen of 
mimeticus at present known comes from Msaromsaro north- 
west of the Lake. It is therefore of very great interest 
that, at the place where both species of Danaines do occur 
the Papilio should be intermediate in appearance between 
them; further, that where mercedonia exists apparently 
alone to the west of the Lake the mimeticus form should 
only be found; to the east, where formosa only occurs, 
rex should be the only form. All three species were 
captured at the same time of the year. 
Miillerian Association of Danaines and Papitlios. 
In studying the last two groups one cannot fail to be 
struck with the fact that the mimicry has not all been on 
the side of the Papilios. 
In the first place the widely distributed Tirwmala 
petiverana, Dbl. and Hew., may safely be regarded as the 
ancestral form of the three Danaine members of the 
group. It extends nearly all over tropical Africa in the 
more wooded districts, and can only be considered a 
geographical race of 7. limniace, so common in the 
Oriental region. Ethiopian specimens are of interest in 
exhibiting amongst other differences a distinct shade of 
reddish-brown on the under-side toward the base of the 
fore wing. Melinda mercedonia, Karsch., and M. formosa, 
Godm., on the other hand, are specialized forms with a 
comparatively small and local distribution. In addition to 
their striking red and reddish-brown colour, they differ 
