78 



preserved in spirit, shows that the eyes in life are bright deep green, 

 without bands, but with a slight bronze sheen towards the edges. 



Writing of this species as met with by him in French Congo, M. 

 Roubaud says that it is " somewhat rare at Brazzaville, and is 

 caught only in the vicinity of cattle, at the beginning of the rains, 

 that is to say towards the end of September."* 



Tabanus fasciatus, Fabricius. 

 Systema Entomologiae, p. 788 (1775). 



PLATE VI., FIG. 40. 



The affinities of this and of the three following species have already 

 been dealt with under T. septempunctatus, Ricardo (see p. 73). T. 

 fasciatus, Fabr., is a common West African species, the range of which 

 either in the form of the typical race, in that of the subspecies 

 niloticus, Austen, or in that of forms intermediate between the two, 

 extends from Senegal to the Anglo-Egyptian Sudan and Uganda. 

 Tabanus fasciatus niloticus, Austenf (in which the upper side of the 

 basal portion of the front tibiae is yellowish and clothed with golden 

 hair), differs from the typical T. fasciatus, Fabr., " in the coloration 

 and hairy covering of the front tibiae (which in the typical form are 

 entirely black and clothed exclusively with black hair), in the 

 coloration of the middle and hind tibiae (yellow or greenish-yellow 

 instead of black or dark brown), and in the hind tibiae on the outside 

 having a golden instead of a black fringe. "{ The typical race is 

 represented in the Museum Collection by forty-seven females ; 

 the subspecies niloticus by thirty, and intermediate forms by eighteen 

 females. Details as to localities, etc., are as follows. 



Typical Race. Gambia, 1908 (Dr. T. Hood). Sierra Leone : 



* Cf. Surcouf and Roubaud, Bulletin du Museum National d'Histoire Naturelle 

 Ann6e 1908, No. 5 (Paris, 1908). 



t Second Report of the Wellcome Research Laboratories at the Gordon Memorial 

 College, Khartoum, p. 62, Plate VI. (1906). 



J Austen, op., cit., p. 63. 



