Tabanidae. 115 



Frontal triangle, cheeks, and epistoma grey; cheeks with black hairs, 

 lower down on the yowls yellowish liaired. Antennæ reddish, the 

 basal joints dark grey, style dark ))ro\vn, tliird joint dilated at the 

 base with an excision making the protruding angle rectangular. Palpi 

 (Fig. 34) grey; second joint short ovate. much thickened, sometimes 

 with an indistinct knobbed apex. the joint is beset with long black 

 and whitish hairs. Thorax greyish black with five very indistinct 

 stripes and clothed with greyish black hairs, being somewhat paler 

 below. There are also some yellowish golden hairs on the disc, with 

 a tendency to form three stripes. The præalar callus generally black. 

 Abdomen yellowish red with a black dorsal stripe, the breadth of 

 which is usually a little less than one third of that of abdomen; 

 fourth segment to apex black. Venter yellowish red, first segment black, 

 on the second a very short black basal triangle, being sometimes a 

 short stripe, the last three segments black. Abdomen clothed with 

 partly black, partly yellowish golden hairs, the latter forraing small 

 triangles in the middle line, and found on each side, at the hind part, 

 especially of the second and third segments. On the venter the golden 

 hairs form pale incisures at the hind margins of the segments; the 

 side margins of the abdomen are distinctly black haired. Seen from 

 bellind the abdomen generally shows a silvergrey pruinosity forming 

 more or less distinct median triangles and side spots. Legs with the 

 femora black, reddish at the extreme apex; tibiæ reddish, front tibiæ 

 with the apical half black ; front tarsi black, posterior tarsi brownish 

 black. The femora with long, black hairs on the under side, the 

 front tibiæ with short hairs, a little longer on the outer side; the 

 middle tibiæ long haired ; the hind tibiæ long haired on the inner 

 side, and with a dense fringe of shorter ciliæ on the outer side; front 

 coxæ with long, pale hairs. Wings somewhat yellowish towards the 

 anterior margin; the veins more or less dark yellow. Balteres brown. 



Female. Eyes with three bands. Frontal band and triangle grey, 

 the band distinctly narrowing downwards, more than four to nearly 

 five times as high as broad below; frontal callus more or less qua- 

 dratic; middle callus linear or somewhat spindle-shaped ; ocellar tubercle 

 brown, ovate. Second joint of palpi (Fig. 34) somewhat short, the 

 basal part much thickened, the apex rather sharp; the joint clothed 

 wilh short, black hairs and with somewhat longer, pale hairs at the 

 base. Venter often with a more or less distinct dark middle line, 

 and not seldom more or less darkened, or almost quite dark grey; 

 the reddish markings on the upper side may also often be much 

 restricted, or the abdomen may be quite grey. 



Length 14 — 17,5 mm. 



