274 GLOSSINA LONGIPALPIS [CH. 



REFERENCES. 



Austen, E. (1903). Monograph of the Tsetse-Flies. 



Neave, S. A. (1912). Bull. Entom. Research, vol. in. p. 275. 



Ross, P. H. (1909-10). Reports of the Nairobi Bacteriological Laboratory . 



Sant' Anna, J. F. (191 1). Quoted in 5. S. Bulletin, vol. in. p. 143. 



Glossina longipalpis Wied., 1830. 



Description. This species closely resembles G. pallidipes 

 in its general appearance. It is slightly larger than G. morsitans 

 and may be distinguished by the possession of a fringe of fine 

 hairs on the anterior margin of the third joint of the antennae. 

 In addition the dark brown, transverse, abdominal bands extend 

 close to the hind margins of the segments, and the last two 

 joints of the front and middle tarsi have sharply defined, clove- 

 brown or black tips. The length of the male varies from 

 8*4 to 9'0 mm. and of the female from 9-0 to i0"0 mm. 



Distribution. G. longipalpis is essentially a West African 

 species, its range extending from Senegal to the south-eastern 

 corner of the Congo Free State. In addition a single specimen 

 was collected in 1864, by Sir John Kirk in the Zambesi valley, 

 between Tete and the Victoria Falls. There are no other records, 

 however, of its occurrence further south than the Congo Free 

 State and it seems to have disappeared from the valley of the 

 Zambesi. Between the limits of its distribution the species 

 is fairly common and it is one of the most important tsetse- 

 flies of the West Coast of Africa. 



Bionomics. G. longipalpis, although not closely restricted 

 to the immediate vicinity of water, is not found as far distant 

 from it as G. morsitans. In southern Nigeria, Simpson states 

 that the species is associated with a moister climate and is 

 especially found in denser vegetation of the mixed deciduous 

 forest type. On the other hand, Kinghorn states that in 

 Ashanti G. longipalpis is essentially an open country fly and 

 is not found in the forest belt. The only grass country in 

 which it was rare was Banda and its absence from this locality 

 was attributed to very large stretches of land being under 

 cultivation. The most important observations on the bionomics 



