Bull. Ent. Research. Vol. VIII. Part 2. 



PLfcTE I 



Fig. I. Swamp at Nsawam partly covered with Pistia plants; breeding place of 

 Qulex guiarti and Mansonioides afrieanus. 



Fig. 2. First stage larva of 

 Mansonioides afrieanus. 



Fig. 3. Larva of M. afrieanus 

 attached to roots of Pistia. 



