43 



the mere isolation of infected persons is equally futile consider- 

 ing the enormous reservoir of trypanosomes existing in the big 

 game, the question arises as to whether the big game should not 

 be destroyed. Not only is it the proved reservoir of infection, 

 but also it has been observed that since the rinderpest swept 

 through South Africa, 16 or 17 years ago, big game has increased 

 enormously in numbers, with the result that there has been a 

 corresponding increase of tsetse-fly. The destruction of the whole 

 of the big game over a very large area of country, such as these 

 parts of Northern Rhodesia and Nyasaland, is perhaps hardly 

 feasible, and from other points of view not desirable, and the 

 autlior advocates the advisability of attempting merely to drive 

 back the big game from the neighbourhood of human habitations. 

 He advises that an exact census of the population should be made 

 and the proportion suffering from sleeping sickness determined ; 

 the same to be done in the case of domestic animals, if such exist, 

 and the percentage of infective tsetse-flies to be ascertained. The 

 game must be completely removed from the area and not allowed 

 to return. After an interval of a couple of years or so, the popu- 

 lation of domestic stock and tsetse-fly must again be carefully 

 examined, and we should then be in a position to decide definitely 

 whether or not the driving of the game back from thesite of human 

 habitations would pay. Such an experiment would take some 

 years to accomplish. The investigators regard it as a matter of 

 urgency that something of the kind should be done on a large 

 scale throughout tropical Africa. 



Wetss (A.). Addition au Catalogue des Arthropodes piqueurs de 

 Djerba. [Addition to ihe catah)gue of tlie biting Artliropods 

 of Djerba.]- -.4 ?"f//ryc^' de rinstitut Pcuteur de Tunis, 1912, 

 pt. 4, p. 226. 



Diptera. 



Anopheles algeriensis, Theo. ; the carrier of Filar ia hancrofti 



in man, and Filnria immitis in dogs. 

 Cidex fatigans, Wied. ; a carrier of the malaria of birds. 



Siphonaptera. 



Ctenop.^ylla vnisculi, Duges ; found on Mvs decumanvs. 



Anoplura. 



Haemaiopinus {Folypla.v) acvleatvs, Neum. ; found on a 

 jerboa (Dipus sp.). 



Ixodoidea. 



Ornithodorus savignyi, And. 



The Or7iithodorus has already been reported from Djerba in 

 1911 and since that time the author has found it frequently in 

 the fields at the foot of olive trees near which cattle rest from 

 time to time, and often close to human habitations. It has also 

 been found on the mainland in the neighbourhood of Ben-Gardane 

 and on the frontier of Tripoli, in July 1912. It is well-known to 

 file natives of Tunis under the name of " tobbiah." 



