398 TABANID^ 



mesoj)leur8e. Scutellum with more conspicuously black pubescence, but witli 

 brownish yellow hairs about the margin. 



Abdomen longer and broader with usually a less acuminate tip, mainly 

 rather dull black, with tawny hindmargins on the second to sixth segments 

 (Avith a trace on the l^asal segment) which are interrupted at each side of the 

 pale middle spot, and these liindmarginal line;s occupy nearly a third of each 

 segment, and sometimes the blackish part of the second segment bears traces 

 of dark chestnut, or as mentioned below (unless that specimen belongs to a 

 distinct species) the whole abdomen may vary to a tawnier hue ; there is also 

 a dorsal row of gradually decreasing small whitish yellow triangles on the 

 middle of the first six hindmargins, and these triangles do not extend 

 more than half-way up each segment ; the pale hindmargins and triangular 

 spots much more conspicuous and determinate than in T. hoviniis. 

 Pubescence forming j^ale bands on the hindmargins of llie segments much 

 as in T. bovimis, but more conspicuous because the dark part of each segment 

 next to the pale hindmargin contrasts with the pale hairs on it more than the 

 ferruginous coloring of the same part does in 2\ hovinus ; when seen from above 

 these pale bands of pubescence appear to widen towards the sides, and from the 

 fourth segment to the tip the pale pubescence is more extended on to the 

 disc of each segment ; sidemarginal pubescence mainly black, but with rather 

 narrow yellow patches at the hind corners. Belly brownish black with con- 

 spicuous broad whitish yellow hindmargins (narrowed about the middle) which 

 are continuations of the dorsal hindmargins though only narrowly connected on 

 the sidemargins ; the extreme margin of the dorsal plates (when seen from 

 below) is blackish with broad yellow hindmargins to the segments. Genitalia 

 two-jointed ; basal joint all black bristled, second joint also black bristled but 

 tawny and with yellow hairs on the upper part, and I think this second 

 joint is deeper than in 7\ hovinus. 



Legs dull black with the orange parts rather darker than in T. bovimis, 

 the contrast between the shining broad bare black stripe beneath the 

 front femora and the sides is less conspicuous, because the femora are hardly 

 at all grey dusted and the row of tiny bristles on the anterior margin of the 

 sti'ipe is less regular. Pubescence on the front cox£e darker and that behind 

 and beneath the anterior femora rather dense and mainly black ; hind tibiae 

 with a dense almost entirely brownish yellow ciliation outside, and in fact all 

 the tiny pubescence on all the tibiae mainly brownish yellow except just 

 about the tip. 



Wings with a blacker tinge on the veins. Squamae more blackish smoky. 

 Halteres blacker. 



? . Larger and stouter than T. hovinus and without the tawny or ferruginous 

 coloring of that species. Frontal stripe slightly broader, pale ashy greyish 

 to dull orange with sometimes the raised margins against the eyes on the 

 upper two-thirds blackish grey and the slightly depressed channels on the 

 sides of the calli orange grey, but this character cannot be trusted ; 

 lower black callus wider but more narrowed upwards than in T. hovinus 

 (Brauer's figures are misleading) and more gradually extended into a wider 

 and longer black middle line, but hardly notched on its front margin ; 

 pubescence on the frontal stripe very slight and short, the depressed 

 pubescence being glistening yellow but the more erect hairs black ; frontal 

 triangle pale greyish yellow and wider than in T. hovinus. Face altogether 

 larger and wider than in T. hovinus, and the face and jowls pale ashy grey 

 rather than yellowish with their pubescence pale greyish white rather than 

 yellow, while the sutures between the cheeks and the middle part of the face 

 are less conspicuous especially in the hollow at the lower end ; middle part 

 of the face much broader and more uneven and bearing a slight pubescence 

 on its upper part ; back of the head ashy grey with a very short yellowish 

 (almost whitish) ciliation close to the eyemargin ; ocellar space indefinitely 

 blackish, and a very short black pubescence occurs just behind the vertex ; 

 Eyes in life (according to Brauer) unicolorous blackish brown with coppery 

 reflections ; facets all equally small. Palpi with the last joint long, 

 brownish orange, not much bent about the base and thence tapering 

 almost to a point, with the tiny bristles above and outside usually black 



