98 



Dr. W. M. Graham has kindly supphed the following note : — 

 " Tahanus secedens is common in Ashanti, and is very frequently 

 met with in the carriages on the Gold Coast Government Railway. 

 Hundreds of flies belonging to this species sometimes follow a herd 

 of cattle on the Cape Coast road, making a loud whizzing noise 

 like a wind, which can be heard for some distance. T. secedens 

 also attacks man, and in the month of December, if a clearing be 

 made by the roadside and a tent pitched, the tent will be invaded 

 by numbers of this fly." In the Congo Free State, most of the 

 specimens of T. secedens obtained by the members of the expedition 

 of the Liverpool School of Tropical Medicine were caught on the 

 rivers, in steamers and canoes.* The members of the French 

 Expedition to French Congo for the Study of Sleeping Sickness met 

 with several males of this species drinking on the ground. Writing 

 of T. secedens as it occurs in French Congo, M. Roubaud says : 

 " The females come round houses, and seek to attack cattle. This 

 is the commonest Tahanus at BrazzaviUe, where it is found from 

 the end of September until November. It is very common all along 

 the banks of the Alima, in marshy forests, and districts in which big 

 game occurs, where it would seem to feed especially on the buffalo. 

 It appears to exist throughout the entire course of the Ubangi ; 

 it attacks natives in canoes." t 



Tahanus kingsleyi, Ricardo. 



Annals and Magazine of Natural History, Series 8, Vol. L, p. 318 



(1908). 



Plate VII., fig. 55. 



Although not unlike small specimens of the foregoing species, 

 Tahanus kingsleyi, Ricardo, may be distinguished by the greater 



* Cf. Annals of Tropical Medicine and Parasitology, Series T.M., Vol. I., No. I., 

 p. 45 (February 1 , 1907),where the species is referred to as " Tahanus gabonensis, Macq." 



t Cf. Surcouf and l^.<ynh&nd, Bulletin du Museum National. d'Histoire Naturelle, 

 Aim6e 1908, p. 221 (Paris, 1908) (" Tab anus gabonensis, Macquart "). 



