49 



which has hitherto been met with in the Congo Free State, and 

 Southern and Northern Nigeria, so that its range overlaps that 

 of Chrysops dimidiata, v.d. Wulp. The Museum collection 

 contains thirty-five females, from the following localities : 

 Congo Free State : Kimwenza, March 28th, 1904 ; Yakusu, 

 September 15th, 1904 ; Kimwosa, Leopoldville, 1904 ; and 

 N'Kussu, Cataract Region, November 25th, 1904 (the late 

 Dr. J. E. Dutton, and Drs. J. L. Todd and C. Christy}. 

 Southern Nigeria : Old Calabar, April 16th, 1892 (received from Sir 

 Patrick Hanson, K.C.M.G., F.R.S.) ; a second specimen from the 

 same locality (the late Miss Mary H. Kingsley] ; Ohumbele, August 

 6th, 1900 (Dr. H. E. Annett) ; Odut and Uwet, May, 1906 (G. C. 

 Dudgeon] ; Akwete, Opobo River, October, 1907 (Captain W. H. 

 Best, W.A.M.S.] ; Arochuku, Bende, Cross River, June, 1908 

 (G. C. Dudgeon). Northern Nigeria : Sapele, 1906 (received from 

 Dr. G. F. Darker] ; and Akwatcha, Bassa Province, July, 1906, and 

 January and February, 1907 (Dr. G. J. Pirie). 



In the Congo Free State this species was met with by the 

 members of the expedition of the Liverpool School of Tropical 

 Medicine (1903-5) " both near and at short distances from water," * 

 while in one instance a specimen was caught in the house of a 

 European. In Northern Nigeria Dr. Pirie found it numerous at 

 Akwatcha in the dry season, and at Sapele it is stated by Dr. Darker 

 to be troublesome to human beings. The severity of the bite 

 inflicted by this species has already been referred to.f 



Chrysops calida, Walker. 



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

 British Museum, Part I., p. 205 (1848) [Chrysops calidus']. 



PLATE II., FIG. 16. 

 At the present time the Museum is urgently in need of additional 



* Cf. Newstead, Dutton and Todd, Annals of Tropical Medicine and Parasitology, 

 Series T. M., Vol. I., No. I., February 1, 1907, p. 43, where the species is referred to as 

 " Chrysops dimidiatus, v.d. Wulp." 



t See p. 43. 



E 



