356 TABANID.« 



long dense black pubescence, though a few hairs beneath near the base are 

 pale, and this joint is prolonged cap-like on the upper side over the short 

 second joint ; second joint also with black pubescence which is however very 

 short on the upper side ; this black pubescence on the two basal joints is 

 much longer and more conspicuous than in T. montanus ; third joint with a 

 conspicuous triangular dorsal hump near the base and with very short black 

 bristles on this hump. 



Thorax black, slightly greyish and moderately shining, with faint traces 

 of two widely separated narrow grey stripes down the disc and of two side 

 stripes which tend to connect with the inner stripes on the front part and 

 about the suture ; prsealar calli not at all ferruginous. Pubescence erect, 

 rather dense, black but with some (or a very few) thin grey depressed hairs 

 . intermixed on the disc, and with more obvious grey hairs on the front part 

 to which the black hairs do not extend ; the hairs just above the wing-base 

 are sometimes rusty black ; pubescence on the pleurae long dense and mostly 

 greyish black but mainly grey along the dorso-pleural suture and sometimes 

 on the upper part of the mesopleurse and under the front part of the wing- 

 base where there is a tuft, while there is a dense conspicuous whitish or 

 yellowish Avhite tuft on the prothorax and a very large tuft on the meta- 

 pleurse. Scutellum colored like the thorax and with similar black pubescence, 

 but with a few long grey hairs towards its tip. 



Abdomen black, moderately shining, with the sides of the second and 

 third and part of the first segments brownish orange; basal segment black 

 with about a quarter of the hindmargin near each side rather broadly (about 

 one-third the segment) brownish orange ; second and third segments brownish 

 orange mth rather less than the middle third black (and sometimes the sides 

 of the third segment obscurely blackish) ; sometimes just the sides of the 

 fifth and sixth segments obscurely ferruginous ; the second and third 

 segments each have a conspicuous tuft of greyish white hairs at the middle 

 of the hindmargin, that on the second segment being the more distinct and 

 resting on a small indeterminate greyish triangle, while that on the third 

 segment is less conspicuous and is on a less distinct grey ground colour, and 

 sometimes a trace of a similar grey tuft exists on the middle of the hind- 

 margin of the fourth segment ; the greyish triangle on the second segment 

 extends nearly up to the middle of the segment ; the second to sixth segments 

 have a whitish or orange hindmarginal fringe for a long portion of each side 

 but not on the middle third ; when the abdomen is seen from behind the 

 orange markings appear more or less pale grey, sometimes only slightly, but 

 sometimes widely on the second segment and sometimes on all the orange 

 part, and the third to sixth hindmargins may have narrow pale grey or orange 

 hems, and a very narrow grey hem may be visible on the seventh hindmargin ; 

 sidemarginal pubescence distinctly black except at just the hind corners of 

 the segments. Belly pale brownish orange on the second, third, and fourth 

 segments though sometimes only indistinctly so ; basal segment black, and 

 sometimes with a narrow base to the second segment which widens on the 

 middle quarter or more to nearly half-way across the segment, and also just 

 the sides of the fourth segment, while the rest of the belly is blackish ; hind- 

 margins of the second to sixth segments with distinct white or pale yellow 

 fringes ; pubescence on the second, third, and fourth segments mainly pale 

 and depressed, but often black about the middle part and more widely 

 towards the base of the segments, while there may be a longer more con- 

 spicuous black tuft on the blackened middle base of the second segment : the 

 fifth and sixth segments bear sloping black pubescence and a few pale nairs 

 about the sides ; seventh segment with rather conspicuous almost erect black 

 bristly hairs which are not dense but are longer and stronger than the other 

 pubescence. Genitalia with large ti'iangular greyish black lateral plates, 

 Avhich bear pale pubescence especially as a longish fringe on the upper 

 margins, and between these lateral plates are two subquadrate plates which 

 have a brownish orange endmargin and a pale marginal fringe. 



Legs black, but brownish red on the extreme tip of the femora and on 

 nearly the basal half of the front tibi:« ; middle tibi;i3 obscurely reddish or 

 orange up to near the tip, and also the hind tibiae for about the basal half or 

 more though usually only obscurely so posteriorly for nearly all the length 



