186 



THE WESTEEX PEOVITs^CE 



and the vegetation on their banks might he that of the west eoast of 

 Africa, for it iuchides the Pandanus, or screw pine, so characteristic of 

 West African mangrove swamps. These forests of the Dm-ra, of Kibah', 

 and of the Upper ]\Ipauga contain large numbers of chimpanzees, and 

 it is from these that were obtained the specimens of the Uganda 

 chimpanzee which we sent to the British JMuseum. Tliere are also 

 colobus monkeys of the common species, and another colobus, which I 

 took to be new to science, but which apparently has been found by Dr. 



liu. 1^ KAsTEKX TORO 



Peters on the Tana Eiver in East Africa. This monkey has long fur of 

 reddish grey, with a bright red crown to its head. 



These Mpanga-Durra forests swarm with butterflies of particularly 

 gorgeous colours, brilliant even for tlie tropics. One butterfly, aliout the 

 size of the English cabbage-white, is simply pure scarlet all over the 

 upper surface of the wings. Others are bright ultramarine blue, or pale 

 blue with fluffy white tails. Others, again, have a divine purple sheen 

 which in certain lights turns all their markings of black and brown and 

 fawn colour to an unbroken violet. There are the usual gorgeous swallow- 

 tails of black, white, and yellow with ocelli of crimson or dark blue, or 

 of velvet-black embroidered with shining gold, or scalloped with azure- 



