RESEARCH IN SIERRA LEONE. 179 



The road from Bewama to Mongheri crosses the River Taia at Jagbara and 

 after striking across a bend re-crosses this river before Mongheri. G. palpalis 

 and H. murphy i were found at Jagbara, and the same two species also occur at 

 Mongheri. Ceratopogon sp. was also troublesome at the latter place. Between 

 Mongheri and Yele the road skirts the southern end of the Kagnari Mountains, 

 practically follows the right bank of the River Taia, and crosses several large 

 tributaries of this river. G. palpalis was seen at several of these and also at 

 Yele on the River Taia. Where the road runs near the mountains, which are 

 densely clothed with thick forest, G. fusca was caught, while at Yele Tabanus 

 rttficrus was obtained, and at a swamp near that town H. murphyi was captured. 

 From Yele to Makump the road runs along the western side of the Kagnari 

 Mountains and afterwards skirts the base of the Masamanka Hills. The whole 

 country is densely wooded, and Glossina fusca is to be found almost everywhere 

 {see map). 



Between Yele and Mayeppa G. palpalis was caught on a stream near 

 Dumballa, and further on again on the River Kanasi between Mayeppa and 

 Matotaka. At the latter place Eretmopodites chrysog aster was bred from larvae 

 taken from a calabash used as a t; juju- T ' or "medicine-pot," and Hippocentrum 

 murphyi were found near a swamp at the same place. The country between 

 Matotaka and Makump is thickly covered with oil palms and there are numerous 

 swamps. The River Pampana, or Sanden, or Taia, or Jong, is crossed not far 

 from Matotaka. The town of Makump stands on the bank of the Rokell River, 

 aud on both these rivers G. palpalis occurs in large numbers, while in the 

 heavily-forested region between them G. fusca is abundant. At Makump, in 

 addition to G. palpalis, Stegomyia fasciata and a new species of Haematopota 

 were obtained. 



The region between Makump and Yonnibanna has been described by the 

 writer when discussing the branch railway {see p. ). Between Yonnibanna and 

 Moyamba the only blood-sucking insects seen were G. fusca, near the town of 

 Bambama, and G. palpalis at that town. 



(8.) Moyamba to Bonthe, Subu, Mafwe, Mattru and Rotifunk. 



Moyamba to Bonthe. This is the direct line of communication between 

 Freetown and Bonthe and is the route by which the mails are carried. The 

 first part, namely from Moyamba to Sembehun, is accomplished by road ; the 

 second part, Sembehun to Bonthe, by rowing boat down the Sembehun creek. A 

 well-made road connects Moyamba and Sembehun through a densely-wooded 

 country. Glossina fusca occurs at several places on this road. 



Sembehun is an important town standing at the head of a long creek of the 

 same name ; its importance is due to the fact that the tidal influence ends there 

 and canoes cannot ascend any further. Consequently it is a sort of loading and 

 unloading inland-port for Bonthe. It is surrounded by mangrove swamp which 

 is uncovered when the tide is out. G. palpalis is everywhere to be seen, and 

 T, besti var. arbucklei is not uncommon. 



The whole creek with its mangrove swamp is characteristic of all tidal reaches 

 in West Africa. As far down as Yorke there are patches of higher land, and 



