96 



Tabanus billingtoni, Newstead. 



Annals of Tropical Medicine and Parasitology, Series T. M., Vol, I., 

 No. I., p. 46, PI. III., fig. 1, and PI. IV., figs. 10-12 (1907). 



Plate VII., fig. 53. 



Although almost identical as regards the pattern of the wing- 

 markings, the present species can easily be distinguished from the 

 foregoing by the abdominal characters, including the yellow base, 

 narrow yellow bands, and absence of median dorsal triangles. Des- 

 cribed from specimens collected in the Congo Free State, during the 

 expedition of the Liverpool School of Tropical Medicine to the 

 Congo, 1903-05, the only other country from which Tabanus 

 hillingtoni has yet been received is Southern Nigeria. The locaHties, 

 etc., of the eight females in the National Collection are as follows. — 

 Congo Free State : Bolengi, Upper Congo, July, 1903 {Dr. E. A. 

 Lay ton) ; Baptist Missionary Station, Tshumbiri, near Leopold- 

 ville, 1904 {Rev. and Mrs. Billington); Lopori River, Upper Congo, 

 October, 1907 {Rev. W. D. Armstrong). Southern Nigeria : Ologbo, 

 May, 1906 {G. G. Dudgeon). 



Tabanus secedens, Walker. 



List of the Specimens of Dipterous Insects in the Collection of the 

 British Museum, Part V., Supplement I., p. 224 (1854), — for 

 Tabanus tibialis, Walker {nee Macquart), op. cit., Part I., p. 162 



(1848) {nomen bis ledum). 



Plate VII., fig. 54. 



This species, of which Tabanus gabonensis {garonensis), Macq., 

 is a synonym,* is somewhat variable in appearance according as 



* 'J'ahanna hlancJiardi, Siircoiif {Archives de Parasitologic, T. XI., p. 473, PI. IX., 

 figs. 3, 4 (1907), and T. brunnfsci'ns, Ricardo (Annals and Magazine of Natural 

 History, Ser. 8, Vol. I., p. 322 (1908)), are also synonyms of T. secedens. Walker. 



