368 TABANID.E 



abundant near the wing-base ; pleurse clothed with dense long pubescence 

 in which the grey hairs predominate except on the middle of the mesopleurae. 

 Scutellum with rather longer black pubescence than that on the disc of the 

 thorax and with no thin pale grey hairs intermixed. 



Abdomen shining black (much more shining than in the other species) 

 with the sides of the second and third segments bright reddish orange, and 

 the broad black dorsal line widest on the basal third of the second segment ; 

 the sidemargins of the second and third segments (when seen from above) 

 appear to be oljscurely blackish but this is caused by the dense erect black 

 pubescence. Pubescence rather dense and mainly black, but there is a distinct 

 small greyish white tuft on the middle of the hindmargin of each segment 

 and the outer thirds of the hindmargins of the second and third segments 

 bear obvious whitish grey fringes, while the hind corners of the basal 

 segment are broadly clothed with pale hairs, and just the hind corners of the 

 fourth, fifth, and sixth segments have a tuft of whitish pubescence, and the 

 protruding genitalia bear whitish hairs. Belly mainly reddish orange, but 

 the basal segment mainly, the second segment usually, with a dorsal line 

 and two oblique streaks, the end part of the fourth segment, and the whole 

 of the succeeding three segments, blackish ; the segments have narrow 

 whitish hindmargins which bear whitish fringes, and these fringes are rather 

 conspicuous on the second, third, fourth, and sometimes fifth hindmargins ; 

 pubescence on the rest of the belly black but not short on the middle 

 of the segments and rather tuft-like on the middle of the hindmargin of 

 the basal segment, but the side flanges which overhang the basal segment 

 bear pale hairs ; the usual black bristly hairs on the seventh ventral segment 

 are present but are not very conspicuous. Genitalia with two long blackish 

 lamellae protruding from the middle third of the hindmargin of apparently 

 the sixth dorsal segment because the true sixth segment is very small. 



Legs mainly black, but the tibiae extensively dark brownish orange on 

 about the basal half of the front pair, on all the middle pair except the tip, 

 and on all the underside of the hind pair except at the tip, while the upper 

 side of the hind pair is usually blackish brown, and just the base of the 

 posterior tarsi is brownish orange. Pubescence all black, rather abundant 

 on the femora ; front tibiie with a slight ciliation behind ; middle tibiie with 

 very long and abundant ciliation on the upper side, and with a rather shorter 

 and less abundant ciliation on the underside ; hind tibite with a coarse dense 

 ciliation on the upper side, and a shorter and finer but equally dense ciliation 

 on the underside, and with a few long thin hairs there ; front tibite about 

 the tip and the front tarsi with rather numerous " touch-hairs." Pulvilli dark 

 yellowish brown ; claws black but indistinctly brown about the base. 



Wings rather smoky brownish ; costal and subcostal cells brownish 

 yellow ; stigma conspicuously blackish with a brownish surrounding, while 

 all the cross-veins near the base of the discal cell and the base of the cubital 

 fork are obviously blackish brown, as is also usually the ujDper cross-vein closing 

 the discal cell. tSquanite blackish glassy with a slight yellowish brown tinge, 

 and with the usual yellowish tuft at the angle. Halteres brownish black. 



? . Very similar to the male. Frontal stripe greyish yellowish brown or dark 

 ashy grey, not three times as long as its broadest part (top) and very 

 gradually diminishing in width from the vertex to the frontal triangle ; 

 lower callus shining black and bare, slightly broader than high and 

 usually rather rounded above so that it does not extend to the eyes except 

 at its lower edge, and it amalgamates in colour with the shining black frontal 

 triangle and is only separated from that by the transverse line which bounds 

 the lower callus against the slightly inflated frontal triangle ; lower callus 

 united by a black middle line (varying in breadth and distinctness) with the 

 unusually large elongate oval or peg-shaped dull black middle callus, and 

 this middle callus is not very sharply defined but occupies about the middle 

 third of the frontal stripe without ever extending outwards to the eye- 

 margins and is sometimes connected indistinctly by a line with the upper 

 callus which is rather triangular in shape and includes the shining black or 

 chestnut ocellar space ; pubescence of the frontal stripe unusually long 

 and comparatively abundant, often almost all black but usually with obvious 



