RESEARCH IN SIERRA LEONE. 189 



S. sugens : — Freetown ; Kaballa ; Batkanu ; Benikoro ; Firiwa ; Sonkonia ; 

 Tirikoro. In one case the larvae of this species were found in a pool in the river 

 Waliki, over 5 miles from a human habitation, and again in a pool in an exposed 

 rock near the source of the Niger, at least two miles from the nearest village. 



S. apicoargentea : — Daru. 



From these data it will be seen that this genus, and especially the species 



fasciata, is not restricted to any definite region but occurs at very widely 



separated localities in the Colony and Protectorate. In Freetown more than 



90 per cent, of the samples of mosquito larvae found in the native compounds 



and elsewhere proved to be S.fasciata. 



IX. Parasites of Mammals, Birds and Eeptiles. 



Scattered throughout the report will be found records of the various ecto- and 

 endo-parasites from mammals, birds and reptiles, examined in Sierra Leone. It 

 might be useful, however, to collect and bring together all such records in a form 

 more handy for reference. 



The author hopes at some future time to make a more exhaustive study of 

 the various parasites in West Africa, their hosts and distribution, but in the 

 meantime little more can be done than to tabulate those found in the different 

 colonies. During my tour in Sierra Leone, I made a large collection of 

 Mallophaga and Anoplura from mammals and birds ; several of the birds were 

 obtained by the author, but the great majority were shot by Major H. J. 

 Kelsall, R.A., who accompanied me on a bird-collecting tour for two months. 

 These parasites have not yet been identified and cannot be included in this list. 

 Many worms taken from different hosts also await identification, so that the 

 following list can be regarded only as provisional. 



Mammals. 



Cattle : — Boophilns australis, Haemaphy salts leachi, Amblyomma variegatum. 



Dogs : — Rhipicephalus sanguineus, R. simus, Haemaphy salis leachi, Ctenocephalus 

 canis, Ct. felis. 



Elephant : — Amblyomma tholloni, Dermacentor circumguttatus. 



Water-buck : — Amblyomma sp. 



Bush-buck or Harnessed Antelope : — Haemaphy salis parmata. 



Marsh Mongoose (Mongos paludinosus) : — Haemaphy salis leachi (see page 176), 

 Ixodes sp. n., Porocephalus sp. (in lungs). 



Birds. 

 Bush-Shrike (Dryoscopus turetii) : — Haemaphy salis leachi. 

 Bush-fowl or Francolin (Francolinus hicalcaratus) : — Haemaphy salis leachi. 



Reptiles. 

 Black Cobra {Naia albicollis) : — Porocephalus sp. 

 Lizard (Agama colonorum) : — Geckobiahieumanni. 



In conclusion, I wish to take this opportunity of thanking His Excellency the 

 Governor, Sir E. Mereweather, K.C.M.G., and all those officials with whom my 



