344 TABANID^ 



lias abundant longer wliitisli pubescence beneath for tlie whole length ; second 

 joint covered with similar dull light grey dust and with a fairly conspicuous 

 circlet of black bristles round the tip, which is very slightly produced dorsally 

 over the third joint ; third joint apparently beginning with a very short bare 

 brownish orange basal segment,* followed by a rather longer more greyish 

 black or blackish orange segment upon which some short black bristles form 

 an irregular or incomplete terminal circlet, and after this by a long segment 

 which begins wider than the previous segment and is obviously though some- 

 times inconspicuously brownish orange on its basal quarter but dark greyish 

 brown on the rest and gradually tapering up to the blackish brown three 

 terminal segments, and these terminal segments form a style which is as 

 thick as the end of the previous segment and as long as that segment after 

 the circlet of tiny black bristles. 



Thorax dull black (blacker than in H. liluvialis) with three narrow light 

 grey stripes from the front part to the suture, of which the middle one is con- 

 tinued almost to the hindmargin but the side ones are interrupted at the 

 suture and continued after that by much wider though short conspicuous 

 whitish grey or almost whitish spots (more conspicuous than in //, liuviaJiiC) 

 and then continued onwards more faintly to the hindmargin, though 

 widening out again and becoming rather more conspicuous close to the hind- 

 margin : humeri and sidemargins rather broadly (especially on the praealar 

 calli) obscurely grey, and this colour curves round to the lowest end of the 

 postalar calli, while another obscure broad grey stripe near each side 

 extends from the suture to the inner end of the postalar callus ; pubescence 

 almost like that of //. plnvialis but with some erect or suberect incon- 

 spicuous black hairs almost all over the disc. Pleurae pale ashy grey, or even 

 whiter than in //. ^)^«i'ia/is. Scutellum dark ashy grey, considerably darker 

 than in //, jduvialts. 



Abdomen dark brownish black, with a fairly broad not very sharply defined 

 yellowish grey or brownish yellow dorsal line which widens out triangularly 

 on the second segment into the brownish grey or pale ashy grey hindmargin, 

 the hindmargins of other segments being also brownish grey or ashy grey with 

 faint indications of shallow middle triangles ; sidemargins broadly but indis- 

 tinctly ashy grey ; each of the segments from the third to the sixth bearing a 

 pair of fairly large rounded brownish ashy grey or brownish yellow spots which 

 touch the foremargin of each segment and which are placed about half-way 

 between the middle and the sidemargins, and the second and seventh 

 segments bearing faint traces of similar spots, while the spots on the sixth and 

 seventh segments often get nearer the middle line. Pubescence on the disc 

 mainly black, short, and depressed, but whitish grey on the hindmargins of 

 segments, on the sides (except at the front corners of the end segments), and 

 on the end, being longer on the sides and end. Belly light grey with a broad 

 greyish black middle stripe from the second segment to the tip (when viewed 

 from behind), or with a pale brown stripe (when viewed from in front) ; 

 seventh segment blackish and bearing all over the middle of the disc longer 

 erect curved black bristly hairs, of which there are indications on the sixth 

 segment, all the other pubescence being short, depressed, and greyish 

 white. 



Legs paler and longer than in //. phwialis ; femora covered all over with 

 whitish grey dust and usually rather obscurely luteous but not uncommonly 

 with an apparently blackish ground colour ; in the most luteous forms the 

 anterior femora are darkened on the basal quarter and more or less so along 

 the ui)per side to the tip, or slightly along the upper side and at the tip, while 

 the hind femora are slightly darkened at just the base and o])viously so about 

 the apical sixth ; front tibiae with a broad (one-third the length of the tibiae) 

 luteous ring just after the base (the base itself being brown), after Avhich they 

 are brown for about half of the remaining part and black on the apical quarter, 

 though there may be a trace of a darker ring on the upper part of the brown 

 portion ; middle tibiae with three less distinct dark i-ings than in Il.p/uvialis, 

 Pubescence more conspicuously whitish, and with only a few black hairs 

 behind the apical third of the front femora and a short antero-ventral ciliation, 

 while only just the tip of the posterior femora bears a few black bristly hairs. 



* Hardly visible in fig. 225. 



