414 TABANID^ 



short thick conical tip, and is slightly excavated just below that tip ; basal 

 joint as long as the second joint, Avith a blackish grey tint except about its 

 tip, not inflated but bearing long Avhitish i;)ubescence. Eyes bare, grey above 

 but green on more than the lower third, with one dark (or rarely purple) band 

 along the top of the small facets ; facets on about the upper two-thirds almost 

 four times as large as those on about the lower third and with a conspicuous 

 line of separation except that the small facets extend in a rather narrow 

 zone all up the hindmargin of the eyes to the ocellar tubercle ; the dividing 

 line across the eyes is hardly undulating but runs nearly straight across 

 the eye to the zone of small facets. Antennae always dull black on the 

 two basal joints, but the third joint sometimes reddish brown at the base 

 or possibly all dark reddish brown (I possess a specimen in which it is 

 all dull orange red) ; basal joint dorsally pointed very cajD-like over the 

 second joint, and bearing very short inconspicuous black bristles above 

 and a few short black hairs beneath ; second joint short, pointed cap-like 

 over the base of the third joint, and bearing a terminal circlet of short 

 black bristles which are most distinct i on the underside; third joint with 

 its basal segment considerably longer than deep and with an obvious 

 angled dorsal hump, after which it is rather concave on the upper 

 side ; style as long as this basal segment, slender and usually bent upwards, 

 with its two basal segments longer than broad and the terminal one longer 

 still and attenuated. 



Thorax greyish black with five faint pale grey stripes, and with the 

 praealar calli usually oljscurely ferruginous ; pubescence fairly abundant, 

 usually mainly black except on the front part, nearly erect and fairly long 

 (especially after the suture and on the scutellum), but on the front part 

 shorter, more depressed, and pale greyish, though the shorter fine and more 

 depressed greyish hairs may extend more on to the disc or especially 

 on to the sides of the disc and when viewed from in front appear to be pre- 

 dominant, or the grey hairs may be even more extended as mentioned 

 later on ; pleurce with dense woolly contrastedly greyish white pubescence, 

 though a few inconspicuous black hairs may be intermixed on the lower 

 part of the mesopleuree. T. maculicornis has the pubescence on the thorax 

 and especially on the scutellum much paler, but with a broad band of black 

 hairs crossing after the suture and the pubescence on the front part of 

 the disc more equal with the rest. 



Abdomen blackish grey, or rarely deep black, with three rows of pale grey 

 spots formed by side rows of distinct rather small but well-defined isolated 

 side-flecks and by a middle row of less distinct short flatfish triangles on the 

 hindmargins of the second to sixth (or sometimes only to fourth) segments ; 

 the side-flecks on the second and third segments sloping from the base outwards 

 and often with a slight yellowish tinge, and isolated as they by no means 

 extend to the hindmargins, and outside the flecks the second segment is 

 indistinctly brown or reddish broAvn to a greater or less extent but becomes 

 paler towards the basal corners ; hind corners of the second segment and 

 thence onwards the sidemargins of the third to sixth segments narrowly 

 yellowish with this colour extending inwards along the hindmargins ; the 

 hindmargins otherAvise (after the basal one) indistinctly and narrowly 

 greyish ; pubescence rather abundant though rather short and depressed, 

 black and bristly on the disc but longer and more erect on the disc of the 

 second segment, A\'hile all the sidemargins up to the end of the sixth segment 

 bear longer softer whitish pubescence, though AA'hen vieAved from above the 

 basal segment shoAvs black hairs (occasionally absent) at the sides of an 

 apparent rather broad black hindmargin, and the second segment appears 

 margined Avith some black hairs just after its middle, and the third just 

 before its middle (but these black hairs on the second and third segments 

 are not on the absolute sidemargins) ; also Avhen seen from above pale 

 pubescence is obvious on the three roAvs of pale spots and along the hind- 

 margins near the sides ; the black bristly pubescence on the fifth and sixth 

 segments slightly longer and more erect than that on the preceding segments, 

 and AA'hen vieAved sideAvays the erect black bristles beneath the seventh 

 segment long and conspicuous. Belly ashy grey Avith a shimmering light 

 grey tinge caused by the dense light grey dust and the sloping Avhitish 



