1911.] G. RiCARDO : Revision of the species of Tabanus. 163 



the stripe in well-preserved specimens is covered with golden 

 yellow hairs and is continuous and straight at sides ; the thorax is 

 covered with short golden yellow pubescence and some black hairs 

 intermixed. The forehead is narrow, quite seven times as long as 

 it is wide anteriorly, where it is almost a third narrower than at 

 vertex. The frontal callus is very narrow with a fine linear exten- 

 sion. The palpi are ^^ellowish covered with black pubescence, rather 

 stout, ending in an obtuse point. The legs are brownish yellow, but 

 the anterior and middle pair paler yellow, the fore tibiae often aj^pear- 

 ing white owing to white pubescence ; in some specimens however the 

 pubescence is black. The wings have the costal border shaded 

 brown extending to the apex, in some specimens it reaches to the 

 hind border, stigma yellow. 



& . Similar, the large facets of eyes occupy the greater portion 

 of eye, the small facets on the lower part occupying about a third 

 of the surface of eye, continued as a narrow border to the vertex. 



Length of specimens from ii|- to 15 mm. 



Tabanus aurotestaceus, cf , Walker. 



List Dipt., V, Suppl. i, pp. 214, 253 (1854). 



Type from Shanghai, and a $ from China (Walker coll.). 



A species near Tabanus hybridus, Wied., but distinguished by 

 the wholly clear wing and black fore femora. 



The cf has a very large head, .4;!y/o/«s-like, fiat above, the 

 small facets occupying the lower third of the e3^e3 and continued 

 as a narrow border to vertex. Thorax and abdomen covered with 

 yellowish tomentum and with black and some yellow hairs. Legs 

 pale yellow, fore femora black, tarsi blackish. The yellow stripe 

 on abdomen is verj^ broad, about a third of the width of abdomen. 

 Length 17 mm. 



9 . A poor specimen. The forehead very narrow anteriorly, 

 about nine times as wide as it is broad, with a long narrow frontal 

 callus. Length 16^ mm. 



Tabanus tristis, Van der Wulp. 



Sumatra Exped. Dipt., 17, 5, pi. i, fig. 9 (1881). 



One female from Datar, Sumatra, in May. 



Black. Abdomen with lateral stripes and antennae ferru- 

 ginous, the lateral borders of thorax and posterior border of scu- 

 tellum pale haired. Wings ashy grey, the costa darkened. 9 . 

 Length 11 mm. 



Eyes naked, divided Ijy a narrow, posteriorly somewhat 

 enlarged, frontal band, on which a stripe-shaped, below a little en- 

 larged, black line appears; the remaining triangular forehead, be- 

 sides the face and the cheeks, with grey-brown tomentum ; the beard 

 pale grey. Antennae rust-coloured; the first joint triangular, the 

 second i)rojecting above spinc-likc ; the third above at the base 



