igii.] G. RiCARDO : Revision of the species of Tabanus. 149 



yellow, brown on the apex, beginning from the base of the fork of 

 third vein and extending along the posterior border, gradually 

 becoming narrower as it approaches the base of wing, the colora- 

 tion very distinct and the two colours sharply divided, veins yellow, 

 brown on the brown part, stigma yellow, no appendix, all posterior 

 cells widely open. 



Group VII. 



Forehead with one square or narrow or oblong callus always 

 prolonged towards the vertex as a more or less narrow line, from 

 five to nine times as long as it is broad. 



Species of medium size or small, with one or more stripes on 

 abdomen, usually continuous, the median stripe always so. 



Tabanus striatus, Fabr., is the typical species of this group. 

 Tahaiius auristriatus , n sp., hybridus, Wied., and aurotestaceus , Wlk,, 

 form almost a subgroup. Tabanus inimanis , Wied., is not known 

 to me and is not included in the table ; neither is Tabanus bubali, 

 Doleschall, which will prove hard to identify from its very meagre 

 description. 



Tabanus annamitus, & , Bigot. 



Mem. Soc. Zool. France, v, p. 630 (1892) {Bellardia). 



Type, male, from Saigon, Cochin China. 



A species with a fulvous abdomen on which appears an in- 

 distinct blackish median stripe, the apex blackish. Wings clear. 

 Legs yellowish. Length 15 mm. 



Byes large, with the large facets very distinct, taking up fully 

 two-thirds of the eye, the small facets on lower part continued to 

 vertex as a narrow border, no appearance of hairs on eyes. Frontal 

 triangle chestnut-brown. Subcallus and face covered greyish 

 tomentum and a few white hairs. Antennae now incomplete, 

 described as yellow, black at apex; the first two joints with black 

 pubescence. Palpi yellow, with paler pubescence. Thorax blackish 

 with grey tomentum. Abdomen reddish yellow, with some grey 

 tomentum, especially visible on the black narrow median stripe 

 which becomes broader towards apex; under side reddish 3'ellow, 

 apex blackish. Legs yellowish, the fore femora darker, covered with 

 grey tomentum and with black pubescence, the posterior pair with 

 chiefly white pubescence, elsewhere it is mostly black. Wings quite 

 clear, veins and stigma yellow, the first posterior cell closed at 

 border. • 



I have seen no specimens identical with this species. 



Tabanus striatus, & 5 , Fabr. 

 (PI. xiii.fig. 7-) 



Ent. Syst., iv, p. 371 (1794) ; id., vSyst. Antl., p. 103 (1805) ; 

 Wied., Dipt, exot., p. 79 (1821) ; 'V/., Auss. Zweifl Ins., i, p. 135 



