4 6 
bovinus are not noticeably larger than those in the lower, the facets in 
the upper two-thirds of the eye of the male T. sudeticus are, with the 
exception of those on the hind margin, at least four times the size of 
the rest. In both species the eyes are devoid of bands, and, according 
to Brauer (loc. cit., pp. 184, 185), in the living insect, while those of 
the male of T. bovinus are entirely green, the eyes of the male T. 
sudeticus are " blackish, with a coppery sheen, the larger facets greyish, 
the smaller ones more reddish." In the case of the females the colour 
of the eyes is given by Brauer {loc. cit., p. 136) as " emerald green " in 
T. bovinus, and as " always blackish-brown, with a coppery sheen " in 
T. sudeticus. In both sexes the pale hind margins of the abdominal 
segments are usually more distinctly marked off from the ground colour 
in T. sudeticus than in T. bovinus. 
The British series of Tabanus bovinus in the possession of the 
Museum includes two males (both of which are from the Waller 
Clifton collection, and unfortunately without either localities 
or dates), and nine females, all from the southern counties ; 
the following are the localities and dates of the female specimens : — 
Oxshott, Surrey, June 16th, 1895, (IV. R. Ogilvie Grant); 
Farnham, Surrey, July 13th, 1899, — "on window of Sub Post Office" 
(A. Rawlins) ; Froyle, Hants, July 6th, 1893 (IV. R. Ogilvie Grant) ; 
Lyndhurst, New Forest, Hants, June 30th, 1894 (Lieut. -Colonel 
Yerbury), July 21st, 1890 (F. W. Frohazvk), and August, 1893 
(L. C. Chawner) ; Ringwood, Hants, June 29th, 1894 [Lieut. -Colonel 
Yerbury); and Ivybridge, S. Devon, July 26th, 1889 (Lieut.-Colonel 
Yerbury). 
The two males are respectively 20 and 2i|mm. in length, and their 
wing-expanse is 37! mm. in the one case and 39 mm. in the other. 
The smallest British female in the Museum series is 2\\ mm. in length, 
the largest 23I mm. (wing-expanse 47 mm.). 
In addition to British specimens of T. bovinus, the Museum 
possesses examples from the South of France, Hungary; and Polish 
Ukraine. Additional localities given by Brauer show that the species 
is found from Sweden to Italy, and eastwards to Siberia and the Amur. 
Of the habits of this species Brauer writes {loc. cit., p. 187) : — 
" The females swarm round horses, cattle, and deer. The males hover 
in the air in clearings in woods, and above somewhat elevated places 
