18* 



produced, black haired, second black above, third ochraceous, narrow, 

 above angulated, hardly forming a tooth. Forehead very wide, yellow 

 pollinose, on vertex and as far as the anterior angle of eyes with very 

 short black hairs, and with no shining callus. Eyes short pilose. 

 1'horax yellow pollinose and yellow haired, intermixed with black hairs, 

 at the base of the wings thicker. Abdomen blackish, slightly yellow 

 pruinose and with a very large luteous spot on each side from the 

 exterior angle of the first segment, and as far as the posterior margin 

 of the third segment, a black spot lying between, which is extended 

 continuous to the anterior margin of the third segment ; first segment 

 with the borders of the following segments except the last, and lateral 

 borders of abdomen yellow haired, rest of abdomen black haired. 

 Underside blackish, with yellowish ashy grey tomentum, borders of 

 apical segments luteous, pubescence of abdomen for the most part black, 

 at the base, sides and posterior border of anterior segments yellow 

 haired. Legs obscurely luteous, black haired, anterior femora at base, 

 anterior tibiae on apical half, extreme apices of posterior tibiae, whole 

 of anterior tarsi, and posterior tarsi from apex of the first joint, black. 

 Ilalteres luteous. Wings brown cinereous, yellow before the first longi- 

 tudinal vein, stigma and vein dark brown, with an appendix ( ! ), first 

 posterior cell at apex subdilated. From Ricardo's translation. 



The type and this species are not known to me, but I ihtnk it 

 may be an Atyloiits, as Ricardo thought. 



Subgenus, TABANUS (sens. str.). 

 Zeller, Isis, p. 814, 1840. 



The characters of this subgenus are the same as those of the 

 comprehensive genus Tabanus (sens, lat.) with certain limitations — Eyes 

 bare, vortex without any ocelligerous tubercle. 



Even these two characters are not absolute, as some species 

 have an almost microscopical sparse pubescence on the eyes, and some 

 have faint traces of an ocelligerous tubercle ; the distinctions in appear- 



