80 G. NIGEOFUSCA: DISTINCTIVE CHAEACTEES. 



Congo Free State. The data with regard to the four examples 

 in the possession of the British Museum (Natural History) are 

 as follows : — 



Gold Coast Protectorate : 1 ? , Dunkwa, Ashanti, 23. v. 

 1907, "caught at 2.30 p.m. on collector's leg," and 1 ^ , Obuasi, 

 Ashanti, 31. vii. 1907, "in bush path" {Dr. W. M. Graham, 

 W.A.M.S.). Southern Nigeria : I ^ , Oni River, 70 miles east 

 of Lagos, 16. V. 1910, "caught in house, biting leg of European 

 seated at table," and 1 $ , same locality, i. xii. 1910, " caught in 

 house " (Dr. W. A. Lamhorn : presented by the Entomological 

 Research Committee). Newstead records '* 2 (J (J and 1 $ , 

 taken in Ashanti, at Sunyani, Odumase, and Atroni, on March 5, 

 April 27, and August 16, 1910, respectively {Dr. A. Kingliorn), 

 and 1 ^ , caught at Kasongo, Congo Free State, on February 6, 

 1904 {the late Dr. J. E. Diifton and Dr. J. L. Todd). 



Bionomics. 



All that can as yet be said under this heading may be 

 gathered from the brief notes printed in the previous paragraph, 

 which show that G. nigrofusca sometimes enters houses and will 

 even attack the inmates, and that it appears to settle by 

 preference on the legs. 



Synonymy, Affinities, and Distinctive Characters. 



The present species was actually described by Newstead 

 under the name Glossina grossa, Bigot, which, as will be seen 

 below,| now proves to be a synonym of G. tabaniformis, Westw. 

 The alternative name nigrofusca, suggested by Newstead for 

 what he called G. grossa in the event of his species being found 

 to be distinct from Bigot's, must therefore be adopted. 



As stated above, J in dealing with the affinities of Glossina 

 fusca, Walk., Glossina nigrofusca belongs to the G. fusca group, 

 from the three other members of which at present known 

 it may be distinguished by the length of the fine hair on the 

 third joint of the antennae (compare Figs. 18, 19 and 16). 

 Although the females of G. nigrofusca and fusca closely resemble 

 each other in general appearance, the former is on the whole a 

 larger and bulkier insect ; the head in both sexes is distinctly 

 wider in G. nigrofusca than in G. fusca, and the second abdominal 



* Loc. cit., p. 374. t Cf. p. 81. ; P. 74. 



