Tabanidae. 123 



line shai'p; eyes densely yellowish liaired. Frontal triaugle whitish 

 yellow; face whitish grey with pale liairs. Autennæ reddisli yellow; 

 third joint somewhat more dilated than in pJehejus. the upper angle 

 nearly in the middle of the joint; style longer than the third joint, 

 apical joint long. Palpi with the second joint long elliptical, some- 

 what pointed, whitish yellow, with long, white and, towards the end, 

 some shorter, black hairs. Thorax grey to dark grey, greyish yellow 

 pollinose, densely clothed with more or less pale yellowish hairs. 

 Abdomen is distinctly conically pointed; it is yellowish red, with a 

 more or less broad dorsal middle line and apical segments dark. 

 Venter yellowish red with a middle line and last segments dark. 

 Abdomen densely clothed with short, somewhat depressed, pale yellow 

 hairs, usually so arranged that the sides of the dark dorsal line shine 

 through and form two narrow dark bands, converging towards the 

 apex, on which bands there are black hairs; sometimes these bands 

 are indistinct or wanting; some black hairs are also found on the 

 sides of the anterior segments; the venter is chiefly, but less densely 

 covered with pale hairs. Legs with the femora blackish grey, the 

 tips yellow; front tibiæ blackish, yellow at the base, posterior tibiæ 

 yellow with dark tips; front tarsi black, posterior tarsi brown, basal 

 half of metatarsus yellow. Femora clothed witii long, yellow hairs, 

 all tibiæ with rather short hairs, on the outer side of the hind tibiæ 

 there is a ciliation of partly yellow, partiy black hairs, but the fringe 

 is scarcely so dense as in other species. Wings hyaline. only with a 

 faint yellow tinge quite near to the anterior margin; veins yellow; 

 anterior branch of the cubital fork nearly always with a veinlet. 

 Balteres yellow, knob very pale. 



Female. Eyes unicolorous or sometimes with a narrow band, light 

 greenish, very short and sparingly haired. Frontal band and triangle 

 greyisii yellow, the band with parallel horders, without calii or these 

 very small. Third joint of antennæ somewhat more dilated than in 

 the male. Second joint of palpi long, somewhat thickened a little 

 below the base, especially on the inner side, and hence the apical 

 third somewhat abruptjy thinner; the joint clothed with pale and 

 short black hairs. Abdomen much more truncate than in the male, 

 the reddish markings much more restricted, frequently only seen on 

 the second segment, the two dark dorsal bands always distinct; 

 venter nearly always witli a broad dark middle line or nearly quite 

 dark grey. 



Length 13 — 15 mm. 



Tilis species is easily recognised by its whole exterior. The head 

 and eye-facets are characteristic in the male, and the palpi in the 



