2. TABANUS 385 



yellow ; second joint elongate elliptical, hardly pointed, bearing a few short 

 black bristles on the outside and some longer ones towards the tip as well as 

 some long pale yellow hairs above and (conspicuously so) beneath about the 

 base; basal joint bearing long yellow hairs. Eyes clothed with short dense 

 pale grey pubescence, touching from the very small vertex for fully two-thirds 

 of the distance to the antennje ; facets on the upper and middle parts much 

 larger than those on the rest, so that the small facets extend over the lower 

 third of the front and outer parts and continue as a zone (narrowest at the 

 lower hind corner of the eye) all round the hindmargin up to the vertex ; 

 dividing line of the facets sharply defined and (according to Brauer) bearing 

 a colored or dark cross-band. Antennae orange ; basal joint with only a few 

 short black bristles on the upper side and some longer pale yellow bristly 

 hairs on the rest ; second joint with a terminal circlet of short black bristles 

 which are longest on the underside ; third joint rather short, widened at 

 the base and with an obvious fairly prominent dorsal hump at the middle of 

 its basal segment, and with some minute black bristles on the hump; style- 

 like portion of the third joint slightly darkened, quite as long as the basal 

 segment, and with its last articulation long and narrowly conical. 



Thorax and scutellum dull greyish black ; prtealar calli grey ; the greyish 

 tints caused by abundant pale ashy grey dust ; pubescence composed of 

 fine not short sloping greyish yellow hairs, which develop into patches of longer 

 pale grey hairs above the wing-bases and on the postalar calli, but persistent 

 long suberect stiff black iiairs also occur all over the disc. Pleurae clothed 

 with dense light greyish yellow pubescence (amongst which no black hairs 

 are to be found) which becomes almost whitish yellow on the metapleura^. 



Abdomen greyish broAvn with the basal corners rather fulvous, and with 

 a broad greyish Ijrown middle stripe (when seen from above) which has almost 

 straight sidemargins, but when seen from behind this broad stripe has a broad 

 equal light yellowish grey middle dorsal stripe (no row of pale middle 

 triangles) outside of which are grey-brown stripes rather darker than the 

 space outside them but rendered rather conspicuous through the absence of 

 pale pubescence, but all stripes become very vague after the third segment ; 

 when viewed from above the dull brownish orange or fulvous colour occupies 

 the outer quarters of the hind half of the basal segment, the whole outer 

 thirds of the second segment except a small blackish spot near each hind 

 corner, and a spot on the foremargin on each side of the dark dorsal 

 stripe on the third segment ; sidemargins after the basal segment all yellow. 

 Pubescence on the two dark stripes short, black, and inconspicuous, but on 

 the lighter middle stripe less short, depressed, whitish, and less abundant 

 (abraded ?), but more abundant and conspicuous outside the two dark stripes 

 and about the tip, and less obviously blackish about the sides of the 

 basal segment than in A. fulvus. Belly greyish black, but ferruginous 

 on the hind corners of the basal segment, on the outer thirds of the second 

 segment, and on a spot on each side of the middle stripe on the third 

 segment, thus leaving a broad almost equal greyish black middle stripe ; 

 pubescence rather abundant and pale, especially forming fringes on the hind- 

 margin of the second and subsequent segments, but some of the short incon- 

 spicuous hairs on the middle stripe are black and also some on the ferruginous 

 parts of the second segment and on similar parts of the basal segment, while 

 the basal segment has a small rather dense clump of black hairs on each side 

 of the middle of the hindmargin ; seventh segment with numerous hardly 

 curved black bristly hairs. 



Legs blackish grey and orange ; all the femora grey dusted and orange at 

 just the tip, and the orange or fulvous colour extends on the underside of 

 the front femora to the apical half, so that the bare channel on the underside is 

 deep black on the basal half (in strong contrast to the greyish sides), and is 

 fulvous on the apical half but margined there with deep black, Avhile the tiny 

 bristles on its anterior margin are very small ; front tibiae orange on the 

 basal half, though the blackish colour extends much nearer to the base on the 

 underside, and the posterior tibiae wholly orange except at just the 

 brownish tip ; posterior tarsi yellowish brown on the basal joint except at 

 its tip, but the front tarsi deep black. Pubescence pale yellow on the 

 femora, but black about the tip of the front pair. 



2 B 



