Bull. Ent. Research. Vol. XII. Part 4. 



Plate XIII. 



Male Genitalia of West African species of Simulium. 



Fig. 1. Simulium liirsutum. Pomeroy, sp. n. 



2. ,, unieornutum, Pomeroy. 



3. ,, divergens, Pomeroy, sp. n. 



4. ,, aleoeki, Pomeroy, sp. n. 



