igii.] G. RiCARDO : Revision of the species of Tabanus, 199 



substitutes breast sides for i)leurae.) Abdomeu inclining to 

 rusty yellow ; on the posterior segments the base is clear brown, 

 which appears as an indistinctly defined band; on the po'^terior 

 border of each segment a triangular spot appears, and the border 

 itself has whitish hairs. Wings more or less tinged yellowish, with 

 almost leather-yellow veins. Halteres yellowish. I/Cgs ochre- 

 brown. In the Roval Museum. Wied., Anal. Entom., 21, 8. 



Tabanus incultus, 9 , \'an der W'ulp. 



Sumatra Exped. Dipt., ly, 4, \)\. i, fig. 8 (1881). 



Two females in Lebong, Sumatra, in May. 



Brown. Antennae ferruginous. Abdomen with ochraceous 

 segmentations ; anterior legs black, tibiae at the base yellow. 9 . 

 Length 14-15 5 mm. 



Face yellowish, with ashy grey tomentum, towards the borders 

 of the eyes lighter ; forehead more rust-coloured ; frontal band 

 very narrow, gradually widening towards the vertex ; the black 

 stripe lineal ; pubescence of the face brownish. Beard tawny 

 yellow. Eyes naked, with fine network. 



Antennae red-yellow, the first joint triangular, the second 

 above with a little bristle, the third at the base with a sharp tooth, 

 the apex of which is brown, the curved end of the joint black- 

 brown (see plate). Palpi gre3^-brown ; proboscis black. Thorax 

 and scutellum grey-brown with partly yellow, parti}- l^lack-brown 

 pubescence, which is longer on the sides of the breast ; on the thorax 

 some traces of lighter stripes. Abdomen above black-brown, with 

 ochre yellow segmentations which are distinctly marked, especially 

 in the middle, by a short white pubescence ; under side red-brown 

 with very broad 3-ellow bands on the segments. Fore legs black, 

 the tibiae for wholly two-thirds at the base pale yellow ; middle legs 

 brown-yellow, the coxae and femora at their base blackish, the 

 tarsi with the exception of the base, black-brown ; hind legs 

 black-brown with the knees besides the inner border and apex 

 of tibiae yellowish ; the pubescence of legs pale and appressed, 

 except on the outer side of the hind tibiae where it is very dark 

 brown and upstanding. Halteres yellow. Wings tinged yellow- 

 grey, more brown-yellow along the fore border ; the stripe-shaped 

 stigma tobacco- brown, the neuration normal. Although the above 

 specimens have too much conformity with each other, for me to 

 have the least doubt of their belonging to the same species, yet 

 I must refer to single differences. The descrii)tion is taken from 

 the largest specimen ; in the other the forehead and face are uni- 

 formly ochre-3'ellow, also the pubescence of the face, of the beard, 

 and of the segmentations of the abdomen, which are broadened 

 out in the middle into triangular spots; the under side is darker; 

 the hind tibiae are except at the apex wholly yellow, 3^et they Ikut 

 nevertheless black-brown pubescence on the outsides. V. d. W'nlp, 

 Sumatra Exi)ed. Dipt., ]). 17. 



