Species of African Simuliidse. 77 



segments ; the ventral surface of the abdomen brown, with 

 blue-grey iridescence. Legs : front legs, coxa? dark 

 purple-brown ; femora dark purple-brown just at apex 

 covered with light yellow pubescence ; tibiae, dark brown 

 front, basal two-thirds covered with shining silver pubes- 

 cence ; tarsi all black. Hind legs: coxae black; femora 

 purple-black ; tibiae, basal third covered with shining golden- 

 yellow hair, remainder purple-black ; tarsi, black first 

 tarsal joint paler in middle, second joint with excision near 

 base. Genitalia : basal pieces large ; claspers large, rather 

 tapering, with two linger-like processes at apex ; anal plates, 

 side-pieces small, with very few strong bristles ; centre plate 

 small with no bristles ; adminiculum rather oblong with 

 peculiar rows of stout spines running diagonally mesad 

 across the lower end of pouch ; arms strongly chitinous, 

 ending mesally in two groups of very strong black spines, 

 surrounded by a spiny membrane. 



Female. — Length 2*3 mm. 



Head : frons and face silver-grey ; antennas black with fine 

 short silver pubescence, the two basal segments pale yellow. 

 Thorax dark greenish black covered with golden pubescence, 

 silver pubescence laterad on the shoulders. Pleurae brown- 

 grey pollinose, lacking the patch of solf hair on the mem- 

 branous patch near spiracle. Abdomen black, heavily covered 

 with long thick matted golden pubescence, which turns silver 

 at the sides, first segment with a fringe of long pale hair*. 

 Legs : front legs, coxae black, femora black, front covered 

 slightly with silver pubescence ; tibiae, basal two-thirds silver, 

 apical third black ; tarsi entirely black ; hind legs, coxae 

 black, femora and tibiae purple-black with silver pubescence ; 

 tarsi, first tarsal joint black at point of base, following two- 

 thirds yellow, devoid of pubescence, black at point of apex, 

 remainder of tarsi black; second tarsal joint with excision at 

 base ; claws simple. 



Type-locality. Bangan, Kamerun, W. Africa, 2. 14. 1916. 

 Alt. 2200 metres. 



Hab. Bred from pupae in swift-flowing mountain streams. 

 Not found biting. 



Paratypes in British Museum. 



L,oc. Top of Table Bay, Capetown, S. Africa. Specimens 

 of pupae obtained Dec. 7, 1912, by K. H. Barnard in Brit. 

 Museum. 



One male dissected from pupa shows the same male 

 genitalia as type. 



Pupa. — Pupal filaments with unique secondary filaments 

 arising from main trunks. The main branches are as 



