AN INTERESTING POLYMORPHIC BUTTERFLY 1B1 
In order that the stock, more especially the calves, may be 
able to get water without going down into these deep pits, 
the natives make enormous saucers of mud, to fill which 
they have to draw water in earthen pitchers. A large part 
of every day is employed in making and repairing these saucers 
and keeping them filled. 
AN INTERESTING POLYMORPHIC BUTTERFLY 
By D. G. Hale Carpenter, M.D., F.E.S. 
During a stay of fourteen months’ duration on Bugalla 
Island — one of the Sesse Archipelago in the north-west corner 
of Lake Victoria, on which I was investigating the bionomics 
of Glossina — I was able to make an extraordinarily interesting 
collection of butterflies of the Nymphaline genus, Pseudacrcea, 
which are very excellent mimics of sundry species of the Acrseine 
genus, Planema. These models are of the following types. In 
one, both sexes have the same colour and pattern ; the wings 
have a very dark brown ground colour with a tawny orange 
band across the fore wings and a white band across the hind 
wings (Planema fogged). In another type the wings are black 
with white patches (Planema macarista and Planema alcinoe, 
the female sex only. The male macarista is of the same type 
as foggeoides ; the male alcinoe is of a different type again and 
is not a member of the mimetic combination about to be 
described). In a third type the fore wings are dark fulvous 
brown with two orange areas and the hind wings are orange 
with dark border. Both sexes of this species (Planema tellus) 
are alike. In a fourth type in which also both sexes are alike, 
the wings are dark fulvous, with creamy blotches (Planema 
ejpoea, form faragea ). Each of these types is very closely copied 
by forms of the Nymphaline genus, Pseudacrcea, that resembling 
the first type was known formerly as Ps. Hobleyi, male, the 
corresponding female resembling type two. That resembling 
the third type was known as Ps . terra, both sexes alike, and 
