50 
Christchurch, Hants, July ist, 1894 (Lieut- Colonel Yerbury); various 
localities in S. Devon, June 24th — July 30th, 1889 {Lieut -Colonel 
Yerbury ). 
Tabanus bromius is distributed throughout Europe ; the Museum 
series (general collection) includes specimens from France, Switzerland, 
Italy, Hungary, and Corsica. As an instance of the abundance of this 
species in certain Continental localities, it may be mentioned that 
Brauer states that he once captured about one hundred specimens of 
T. bromius on a window near Liezen in Upper Styria. 
Tabanus maculicornis, Ztt. 
Plate 24. 
In the marking of the abdomen the females of this species 
resemble those of the foregoing, though the spots are paler and often 
less sharply defined. Apart, however, from their usually smaller 
size and darker appearance, the females of T. maculicornis can at 
once be distinguished from those of T. bromius by the much greater 
width of the light-grey supra-occipital border of the head, behind 
the upper margin of the eyes. In the male sex also the abdominal 
markings are paler than in T. bromius (whitish instead of yellow), 
while the head is relatively much larger. According to Brauer 
(loc. cit., pp. 197-198), the eyes of the male of T. maculicornis 
are " green, with a broad purple band at the junction of the different 
sized facets " ; those of the female are described as " green, often 
with a coppery sheen, with a sometimes narrower, sometimes 
broader, purple band, which becomes less distinct towards the inner 
and outer margins." Tabanus maculicornis is, as a rule, distinctly 
the^smallest of the British species of Tabanus, although small females 
of T. cordiger, Mg. (Plate 25), sometimes do not exceed large females 
of the present species in size. In the British series of T. maculicornis 
in the Museum collection the length of the males ranges from 1 1 to 
13 mm., and that of the females from ii| to 13^ mm. The time of 
flight appears to be June and July. 
Colonel Yerbury notes that this species, like the foregoing, is 
