Geographical Distribution of Acraea lycoa, A. johnstoni. 3 
Niragonwe specimens.’ This form of the male is very 
typical of Western Uganda. The females are not, however, 
distinguishable from those of the more southern Urundi 
District, all being characterised by the extreme paleness 
of the hindwing patch. Passing round the north shore 
of Lake V. Nyanza and on towards the south to the 
Tiniki Hills this hindwing patch becomes more distinctly 
yellow, whilst the males have developed the same feature, 
accompanied by a darker ground-colour and greater dis- 
tinctness and depth of colour in the forewing spots. 
The male of this region is shown at fig. 6. Passing 
southwards and eastwards we find at Kilimanjaro the two 
sexes present much the same pattern, but the ground- 
colour in both sexes is now very dark, the forewing spots 
in the female are smaller, and the hindwing patch is 
slightly expanded again. The sexual dimorphism is still 
well marked. Fig. 7 shows a female of this form which 
is equivalent to the “ Planema” fallax of Rogenhofer, and 
the Acraca kilimandjara of Oberthiir. The species has 
developed to its maximum extent in mimetic approach to 
Amauris echeria and A. albimaculata. Northwards, in 
the district of Mt. Kenia, examples still resemble faliaz, 
but in several specimens the hindwing patch has a 
slightly edentate distal outline between the third median 
and the radial, giving the insect a marked resemblance to 
A. johnston f. confusa. In two males from this district 
the forewing spots are distinctly paler than the hindwing 
patch, and up to this point in the geographical range of 
the species this is the only sign of departure from a 
hitherto consistent sexual dimorphism. This Kenia form 
resembles fig. 7 on the upperside with the exception of 
the slight difference in the hindwing -patch, but the 
insect is generally somewhat smaller. I have figured it 
in monochrome on Plate II, fig. 7. On the underside the 
difference is more marked. In fallax the ground-colour 
of the forewings is dark sepia from the base to the inner 
side of the white subapical spots, the whole apical area 
being dusted with pale ochreous. In the Kenia form the 
dark colour extends beyond the first three subapical spots, 
and the whole of the underside has a generally blacker 
appearance than in fallav. These forms are of excep- 
tional interest, and are amongst the many valuable 
specimens for which the Hope Department is indebted to 
the generosity of the Rev. K. St. A. Rogers and Mr. and 
B 2 
