

390 TABANID^ 



}3lack bristles) ; at the back part of the vertex some distinctly longer 

 black hairs have their tips bent forwards. Palpi dull orange, bearing 

 moderately numerous or even dense stronger black bristles all over except 

 about the base of the underside where only longer thin pale hairs occur, 

 stouter about the base, shorter and less suddenly attenuated to the end. 

 Eyes almost bare ; in life (figs. 233, 234) opalescent green with jieculiar 

 shifting spots according to the point of view, and these spots are rather few 

 in number and are not arranged in rows, but there is also a slight cross-band. 

 Antennae slightly redder orange, with the style brown ; basal joint bearing 

 more numerous and more extended tiny black bristles, which sometimes 

 extend all over the joint but sometimes not to the exclusion of a few glistening 

 pale yellow tiny bristles ; dorsal hump on the basal segment of the third 

 joint less prominent and placed distinctly before the middle of the segment. 



Thorax blackish brown, moderately shining but with the pr£ealar calli 

 entirely dulled by grey dust, bearing short depressed brownish yellow 

 pubescence which becomes longer and denser above the wing-base and thence 

 over the postalar calli to the edge of the scutellum, while intermixed Avith 

 the pale pubescence are abundant suberect longer black hairs which are 

 inconspicuous unless viewed sideways and which are not so dense or long or 

 conspicuous between the humeri and the wing-base as in A. rnsticns ; pleurae 

 light grey dusted and bearing brownish yellow pubescence which becomes paler 

 on the metapleurse. Scutellum similar to the thorax in colour and clothing. 



Abdomen extensively pale brown or brownish grey with a pair of parallel 

 outwardly dentate blackish dorsal stripes and with the fore corners fulvous ; 

 basal segment fulvous on the hind half of the siclemargin extending inwards 

 for more than a third of the segment on each side ; second segment fulvous on 

 the outer thirds except for a small blackish spot at each hind corner ; third 

 segment fulvous on just the front basal corners and more or less obscurely 

 on the flecks on the disc, and the remainder of the sidemargins obscurely 

 fulvous and extending a little on to the disc at the hind corners of each 

 segment, but all the fulvous coloring may be much less extensive ; the two 

 blackish stripes have their margins (esi^ecially the outer margin) conspicuously 

 dentate because the dark spots on the second, third, and fourth segments 

 slope outwards so that they extend outwards at each hindmargin and usually 

 inwards at each base to about half their own width. Pubescence brownish 

 yellow, short, recumbent, and rather dense, except on the two blackish stripes 

 and towards the sides of the segments, so that there appear to be three rather 

 broad stripes of glistening brownish yellow pubescence of which the side- 

 stripes may be interrupted at the hindmargins of the segments, but all the 

 stripes fade out by about the fifth segment, though the brownish yellow 

 pubescence occurs on almost the whole sides of the two basal segments and 

 on the base of the third ; when viewed from behind (the most characteristic 

 view) the abdomen is brownish yellow with two dark brown stripes which 

 form triangles on the five basal segments (faint on the fifth segment and 

 hardly a triangle on the basal segment) ; pubescence on all the blackened 

 parts short black sloping and rather bristly ; sidemarginal pubescence 

 pale brownish yellow ; sixth segment bearing short stiff black pubescence 

 dorsally, and the seventh segment both dorsally and ventrally though the 

 numerous black bristly hairs on the ventral side are scarcely so strong or 

 conspicuous as usual. Belly yellowish ashy grey with usually the greater 

 part of the second and third segments ferruginous but leaving the middle of 

 the second segment greyish black, and with a little ferruginous coloring at the 

 base of the fourth segment, but the sides of the second and third segments 

 and the middle of the hindmargin of the third may be broadly but vaguely 

 blackish, and in some specimens the ferruginous coloring may be very slight. 



Legs blackish grey ; trochanters slightly brownish ; all the femora 

 distinctly orange at the tip, and the front femora nearly all reddish orange 

 Avith just the base (at least posteriorly) black and with an indefinite blackish 

 ring just before the tip, but dorsally and sometimes posteriorly the front 

 femora are more greyish black with rather more than the middle third dull 

 reddish yellow ; middle femora with the outer three-fifths brownish red 

 (sometimes rather obscurely) ; hind femora with very faint traces of similar 

 coloration which is most visible antero-dorsally ; tibiae and tarsi colored as in 



