African PfiLbuloniic Diptcra. 3t*t5 



couspicuoubly cxiniiulcd, niiiklle and liiiul tarsi dark biowu, 

 first joints more or less cinnamon-rut'ons, at least at base, 

 liind tarsi occasionally entirely cinnamon-rufous, or at least 

 tips of joints alone dark brown or brownish. 



Sierra Leone; Sierra Leone Protectorate ; Liberia; Gold 

 Coast. 



Tvpe and twelve other specimens of the variety from Bo, 

 S erra Leone Protectorate, 1, 8, 9, 19. x. 1909 {Dr. H. E. 

 Arhiickle, Jr.A.M.S.). The following are the data with 

 rclerence to the other examples of this variety at present 

 contained in the National Collection : — Sierra Leoxe : 

 2 specimens, Shcrbro 1., January 191j9 {Dr. C. B. Hunter, 

 1F.A.M.S ) ; I specimen, Mill Station, Freetown, November 

 1909 {Majur A. Pearse, R.A.M.C). Sikrua Leoxe Protec- 

 torate : 1 specimen, Port Lokkoli Creek, April 1901' (Major 

 F. Smith, D.S.O., R.A.M.C.) ; 8 specimens, Karina District, 

 October-November 1906 {Dr. H. E. Arbuckle) ; 17 speci- 

 mens, Tiama, 9. ix., Younibanna, 30. x., Alakobo, 11. xi., 

 Koglnitoma, 18. xi., Tembihun, 19. xi., Ebambatuck, 20. xi., 

 Matassu, 22. \i., Benduma, 2:3. xi., Mossellulu, 30. xi. 1909, 

 Matotoka, 26. i., Makonou, 27. i., and Maboon, 28. i. 1910 

 — all localities in llonietta District {Dr. J. J. Moore, 

 W.A.M.S.) ; 2 specimens, Batkanu, Karina District, De- 

 cember 1909 {Dr. J. C. Murphi/, IV A.M.S.) ; 1 specimen, 

 Kenneraa, March 1910 {Dr. H. E. Arbuckle, W.A.M.S.). 

 Liberia: 1 specimen, Gis>i, 27. iv. 1909 {Major A. Pearse, 

 R.A.M.C). Goi.D Coast : 1 specimen, Wassau Territorv, 

 1901 {Dr. S. H. Jones). 



Intermediate form between Tabanus besti, var arbucklei, 

 Austen, and T. besti, Surcouf (syn. T. obscurissimus, Ricardo). 

 — In addition to the foregoing specimens, which clearly 

 l)eloug to the var. arbucklei, as described above, the British 

 ^Museum (Natural History) also possesses eight ? ? of 

 T. besti, which may be regarded as representing a form 

 intermediate between the var. arbucklei and normal T. besti. 

 As compared with the var. arbucklei, this form is distinguished 

 by the subcallus being if anything less prominent and 

 always dull (clothed with brownish pollen, as in the typical 

 race of the species), by the expanded region of the third 

 joint of the antennte being usually broader, and by the 

 proximal portion of the front tibiie, although cinnamon- 

 rufous, being clothed with hair which is whitish or yellowish 

 instead of the same hue as the ground-colour. The details 

 as to localities, dates of capture, &c., of these eight specimens 

 are as follows : — Sierra Leone Protectorate : 3 specimens, 

 K-cnuema. April-:\lay 1910 {Dr. H. E. Arbuckle, W.A.M.S.) ; 



