GAD FLIES. 129 
T. cognatus, Low (= T. glaucopis, Meigen).—Length three-fifths of 
an inch, or rather more. Eyes with two or three purple bands; 
ground colour partly grey and green in male, green in female. Thorax 
grey, bright black on the back, with five observable pale stripes. 
Abdomen may be generally described as black, with the hinder edges 
of the segments yellow, with a middle stripe, on each side of which is 
a stripe of spots of pale yellow. In the female the middle stripe 
formed of grey triangular spots. In the cognatus, noted by Brauer as 
probably only a variety of the above, the thorax is noted as of a darker 
grey, and the ground colour of the abdomen dark red-brown or chest- 
nut-brown to the fifth segment; in the female the red-brown ground 
colour sometimes extends to the sides of the second segment observably, 
otherwise the segments black with smaller and greyer stripe along the 
centre, and pale yellow or orange isolated round side spots. 
The specimen of the above species which I submitted to Mr. Meade 
as being (to the best of my power of identification) glaucopis, he noted 
he should rather conclude it to be cognatus, considered by Dr. Brauer 
to be only a variety of the glaucopis species, and I feel no doubt he is 
correct. 
Sub-genus Therioplectes: T. tropicus, Meig.—Length averaging 
about three-fifths of an inch. Eyes of the male with fine and thick 
yellow-grey hair, three purple bands, and some green in the ground 
colour; of the female green, and also with three purple bands. Thorax 
black grey, with slightly observable stripes. Upper side of the abdo- 
men with the first to the third segment orange, with nearly a third of 
the breadth of the segment occupied by a. black dorsal stripe, the 
ground colour from the fourth to the last segment black. 
Sub-genus Atylotus: A. fulvus, Meigen, ‘‘Tawny Breeze Fly,” 
‘*Golden Yellow-felted and Orange-powdered kind.’’—Length slightly 
more than half an inch. Eyes of the male with thick and long yellow- 
grey hair, commonly without stripes; of female pale olive-green, with 
many black, round, bright points, and a fine sloping darker line. 
Thorax strikingly clothed with golden-yellow hairs. Abdomen with a 
dark stripe, yet of a general reddish-yellow colour, and the hair entirely 
of a golden colour. This species is easily distinguishable from the 
foregoing by its hairy or even felted appearance. 
The above species are amongst the Diptera classed by Dr. Brauer 
and Dr. Schiner in the great division of the genus Tabanus, Linn., of 
which Dr. Schiner gives the general habits as follows :—‘‘ The larve 
live in damp earth, in sand, or beneath decaying leaves and stems in . 
damp places. The flies are abundant on pastures, and by roads and 
paths, where they rest on stems of neighbouring trees, and on the 
look-out for horses and cattle, to which the blood-sucking females are 
very troublesome. The males also frequent flowers, or hover, especially 
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