97 



the narrow median triangles on the abdomen remain fairly distinct, 

 or are merged in a more or less uniform, continuous stripe. Tdbanus 

 secedens is also subject to considerable variation in size, as shown 

 by the fifty-eight females in the Museum Collection, which vary 

 in length from 15 mm. (wing-expanse 31 mm.) to 21 mm. (wing- 

 expanse 39.5 mm.). The species is extremely common in many 

 parts of West Africa, and its range is known to extend from Senegal 

 to the Congo Free State and Uganda. The following are the localities, 

 etc., of the specimens at present in the Museum. Sierra Leone : 

 Moyamba, September, 1906 (J. A. G. Fido) ; Sierra Leone Protec- 

 torate, 1905, " caught in native hut " (Major W. H. Grattan, 

 R.A.M.C.} ; Karina District, Sierra Leone Protectorate, October- 

 November, 1906 (Dr. H. E. Arbuckle, W.A.M.S.). Liberia : Bafu 

 Bay, January, 1909, and Sinu, April 20th, 1909 (Surgeon A. McCloy, 

 R.N.). Gold Coast: exact locality unknown, 1882 (Captains Burton 

 and Cameron) ; Dunkwa, September 25th, 1905 (Dr. McConnett). 

 Ashanti : Obuasi, March 6th, 1906, " in house on window," and May 

 20th, 1906; "caught in carriages on Gold Coast Government Rail- 

 way," June 14th, 1906, and May 23rd and September 6th, 1907, and 

 Huni Valley, May 1st, 1908 (Dr. W. M. Graham, W.A.M.8.). Northern 

 Nigeria: Kaduna River, near Mureji, June 22nd, 1906 (W. F. 

 Gowers) ; exact locality unknown, 1907 (G. C. Dudgeon). Southern 

 Nigeria : Lagos, 1899, 1906 (Dr. W. H. W. Strachan, C.M.G.) ; 

 Cross River and Old Calabar, 1894-95 (the late Miss Mary H. 

 Kingsley) ; Asaba, R. Niger, 1895 (the late Dr. W. H. Crosse) ; 

 Forcados River, June 18th, 1904 (W. F. Gowers)', Odut and Ologbo, 

 May, 1906, and Itu, Cross River, May and June, 1908 (G. C. Dudgeon) ; 

 Calabar, April, 1907 (Major F. R. W. Sampson). Congo Free 

 State : Bolengi, Upper Congo, July, 1903 (Dr. E. A. Layton) ; 

 Congo River, below Basoko, alt. 1400 feet, November, 1906 

 (Ruwenzori Expedition) ; Lopori River, Upper Congo, October, 1907 

 (Rev. W. D. Armstrong). Uganda: Bulamwezi, 1903, from bank of 

 stream (Colonel Sir David Bruce, C.B., R.A.M.C., F.R.S.)', south 

 end of Lake Albert, October, 1904, and Nimule and Gondokoro, 

 November, 1904 (Captain E. D. W. Greig, I.M.S.). 



With reference to this species as observed by him in Ashanti, 



H 



