all 
2 Mr. H. Eltringham on the Forms and 
Department, the National Collection, and the Tring 
Museum, comprising some hundreds of. examples, and 
have made a large number of microscopical preparations, 
with results which it is the purpose of the present paper 
to describe. 
As a preliminary it seems desirable to give some 
account of the known forms and the present state of their 
synonymy. 
ACRAEA LYCOA. 
Acraea lycoa was described by Godart in 1819 (Ene. 
Meth.) from a female example, and the author stated that 
it was not known whether the sexes were alike. The 
first reference I can find to the male is in Staudinger’s 
“ Hxotische Schmetterlinge,” where the difference between 
the sexes is mentioned. Fig. 2 on Plate I shows the 
typical western female drawn from an example received 
from Sierra Leone, whilst fig. 1 shows a male from Oguta, 
Nigeria. In the female the depth and richness of the 
ground-colour varies somewhat, though it is in practically 
every case paler than in more eastern forms. The male 
is frequently semi-transparent, and the forewing spots 
may be only very faintly discerned. Examples from 
Accra and Nigeria present no distinct modifications from 
the extreme western forms. The first recognisable change 
is observable in males from Fernando Po. These resemble 
fig. 1, but the spots on the forewings are now quite 
distinct, and of the same pale reddish colour as the discal 
area of the hindwings, and the whole ground-colour is 
somewhat darker. The females are still like fig. 2, but 
with darker ground-colour. These forms persist over a 
large area, extending without marked variation from 
Fernando Po, through the French Congo, and across the 
Congo State to Toro in 8.W. Uganda. At Toro several 
varieties may be found, since it is here that three geo- 
graphical races appear to meet. From this point the 
species spreads north and south. Between Lake Victoria 
Nyanza and Lake Kivu (Mt. Niragonwe) the males 
resemble fig. 3, whilst fig. 4 shows a female from the 
same locality. To the north of Toro in the Unyoro Region 
the male is modified in a somewhat different manner. 
As fig. 5 shows, the forewing spots have become much 
smaller and more clearly defined, though there is much 
less development of the hindwing patch than in the 
