igii.] G. RiCARDO : Revision oj the species of Tabanus. 179 



A species nearly allied to Tabanus jiimifer, Wlk., distinguished 

 only by its colouring and usually smaller size (i6| — 21 mm), differ- 

 uig in the bright yellow-haired median spots of abdomen which are 

 larger and very distinct, with longer apices, and by the presence of 

 lateral yellow-haired spots on sides of segments in form of isosceles 

 triangles, usually present from the second to the fifth segments; 

 under side more yellow with yellow pubescence on th .^ sides. The 

 thorax and scutellum have a paler appearance with greyisli yellow 

 tomentum and more numerous appressed fulvous hairs. The 

 tomentum on the femora is more yellowish grey. Forehead seven 

 to eight times as long as it is broad, very narrow anteriorl}* as in 

 Tabanus fumifer with the same long narrow frontal callus. Antennae 

 Ijlackish brown, in som.' specimens reddish at base of third joint, 

 the first two joints with some grey tomentum and black hairs. 

 Palpi large, ending in an obtuse point, yellowish with dense black 

 pubescence. Abdomen reddish brown, redder on the anterior seg- 

 ments, the whole dorsum co\ered with thick short black pubes- 

 cence, on the posterior borders of segments appear a few yellow- 

 hairs, the spots consist of a small almost square one on the first 

 segment, on the following four they are triangular in shape with 

 short apices which do not reach the fore border of segment, those 

 on the third and fourth segments usually with the widest bases, 

 on the fifth appear traces of a small triangular spot, all have a 

 yellowish or greyish ground colour covered with bright yellow 

 hairs, sides of segments with spots as described above ; under side 

 covered with yellowish pubescence leaving a broad central black 

 stripe apparent. Legs similar to those of Tabanus fumifer, Wlk. 

 Wings grey, very slightly tinged browm, chiefly on the fore border, 

 stigma yellowish, veins brown, the first posterior cell slightly 

 narrower at opening. 



Tabanus factiosus, cf $ , Walker. 



Proc. Ivinn. Soc. London, iv, p. 102 (1859). 



Type CT" from Celeljes. Type 9 from Makessar, Celebes, both 

 Ironi vSaunders coll. 



Two females from Xegros, Philippines (Whitehead). 

 $ . This large reddish brown species is very nearly allied to 

 Tabanus fumifer, Wlk., indeed the female seems only distinguished 

 from the latter species l)y its larger size and by the fore tibiae being 

 more largely ^^ellowish or white, for quite two-thirds of their length, 

 and Ijy the wings being nearly clear, even the space between costa 

 and first longitudinal vein being only faintly yellow. The thorax 

 appears lighter, having more grey tomentum and a few appressed 

 yellow hairs. Abdomen large, broad, with grey triangular spots on 

 every segment except the first and last ones, on the fourth, fifth 

 and sixth the segmentations are lighter, colour of abdomen reddish 

 brown. Length 23 mm. 



