362 TABANID^ 



Thorax and scutellnm brownish black, only moderately shining, and with 

 the large prisealar calli obscurely chestnut ; pubescence on the disc dense, erect, 

 and black, but scattered in and out amongst it are some thin light grey hairs 

 which are only about half as long as the black hairs and which are very incon- 

 spicuous except on the extreme front part where no long black hairs occur 

 and sometimes (as mentioned below) on the sides of the disc ; mesopleurse 

 usually almost entirely clothed with dense black hairs but with pale hairs 

 on the back and upper parts, though sometimes the black hairs on the 

 mesopleuras are restricted to the middle part, and the rest of the pleurae bear 

 dense long shaggy brownish yellow pubescence. 



Abdomen brownish orange and blackish ; the brownish orange part 

 occupying most of the four basal segments except on the fairly broad 

 blackish dorsal line ; this blackish dorsal line extending all across the base of 

 the first segment but narrowing down to less than the middle third of the 

 hindmargin, and on the second segment forming a large quadrate spot 

 occupying less than the middle quarter of the segment, and the middle 

 part of the blackish space rather greyish or greyish orange while the spot 

 itself may widen somewhat near the hindmargin but usually contracts at the 

 hindmargin itself ; on the third segment the blackish dorsal marking is 

 similar to that on the second segment but slightly narrower ; on the fourth 

 segment it becomes again a little broader and is less sharply defined and 

 becomes wider towards the hindmargin, and very frequently the brownish 

 red marking on this segment is reduced to a pair of moderate-sized 

 si^ots but never to less than that ; near the sides of the second, third, and 

 fourth segments there is an obscure dark line which usually begins very 

 faintly but gradually becomes more distinct and diverges from the sides until 

 it considerably darkens the sides of the foiu'th segment when viewed from 

 above, and it is in such cases that an enlargement of the dorsal line reduces 

 the brownish red colour to a pair of moderate-sized spots with usually the 

 actual sidemargins also brownish red • the hindmargins of the second to sixth 

 segments and the extreme hind corner of the first segment bear a fairly 

 conspicuous yellow fringe, which can hardly be said to widen into shallow 

 triangles about the middle even though it is more persistent and conspicuous 

 there, though I have seen a specimen in which it almost formed shallow 

 triangles on the second and third hindmargins ; the fifth and subse(iuent seg- 

 ments are blackish, but the fifth and sixth are slightly and obscurely reddish at 

 just the sides, and the seventh segment is so short that its sides are concealed 

 beneath the sixth ; remaining pubescence on the upper side of the 

 abdomen usually black, rather dense and outstanding at the sides, and 

 fairly equal all down the sides, but sometimes on the disc with pale 

 hairs on the second, third, and fourth segments just Avhere pale grey flecks 

 occur in other species. Belly slightly paler, being more brownish orange up 

 to (or near to) the end of the fourth segment, but the basal segment 

 obscurely blackish on at least the middle part, and the second segment with 

 a rather large but sometimes badly defined middle black spot ; the fifth to 

 seventh segments blackish ; the second to sixth hindmargins bearing a 

 rather conspicuous yellow hem and fringe and the edges of the fringe at tho 

 dorsal hind corners of the basal segment overlap, and these fringes are most 

 conspicuous about the middle of each hindmargin ; remaining pubescence 

 usually all black and short, but sometimes pale hairs occur on the disc and 

 occasionally almost exclusively. Uenitalia when protruded showing a pair 

 of two-jointed large brownish orange upper lamellae, of which the second 

 joint is nearly as broad as long and bears black hairs on the sides but has a 

 fringe of incurved pale hairs at the end, and beneath these is a pair of long 

 two-jointed under lamellc\i ( = claspers ?), of which the second joint is long 

 narrow bare and horny. 



Legs black but dusted with grey, and the extreme tips of all the femora 

 dull reddish orange, and all the tibiai obscurely reddish orange except 

 that the front tibiae are blackish all down the underside and obscurely 

 blackish on all the apical quarter or even half, while I'arely just the tips of 

 the posterior tibiae are also blackish ; posterior tarsi obscurely reddish orange 

 except at the tips of the joints ; bare space beneath the front femora 

 conspicuously black in contrast to the grey dusted sides, and the row of tiny 



