386 TABANID^ 



Wings less yellowisli about the base and fore part than in A. fidvus. 

 Squamae greyish white with a darker margin to the alar pair and a whitish 

 margin to the thoracal pair, and with the usual tuft near the angle whitish 

 in accord with the tuft on the upper part of the metapleurae. Halteres pale 

 yellow. 



$ . Similar to the male, but the abdomen less fulvous and its two dark stripes 

 more obviously bowed. Frontal stripe parallel-sided, nearly five times 

 higher than broad, dark ashy grey with a slight yellowish tinge, and 

 bearing short sparse depressed whitish yellow hairs all over and stronger 

 longer (but still short) curved black liairs, but the black hairs do not extend 

 to the part between the middle callus and the frontal triangle ; lower and 

 middle calli usually shining black though almost dot-like, but sometimes 

 practically hidden by grey dust ; ocellar space dusted all over so that no 

 upper callus is visible ; frontal triangle pale yellowish grey ; side-cheeks 

 whitish grey with unusually short whitish yellow pubescence, but on the jowls 

 and near them the pubescence is longer, more dense, and pale yellow ; back 

 of the head less hollowed out than in the male, whitish ashy grey, and leaving 

 a very short glistening pale yellow postocular fringe on all the upper part, 

 behind which is an inconspicuous short pale yellow pubescence ; the slightly 

 longer hairs about the back of the vertex mainly black. Palpi pale 

 yellow ; second joint long and thin, dropping almost straight downwards and 

 but little bent, moderately inflated on the basal half and then tapering to 

 almost a point, and this joint bears a moderate number of short black 

 adherent bristles on the upper part and about the tip, but outside mainly 

 only similar but pale yellow bristles, and on the underside (especially 

 near the base) some longer pale yellow hairs ; basal joint also yellow and 

 bearing long pale yellow pubescence. Eyes bearing very short sparse 

 pale _ pubescence, sometimes so slight as to be almost imperceptible ; 

 in life (according to Brauer) sometimes showing a slight cross -band. 

 Antennte dull orange, style sometimes brown ; basal joint bearing dorsally 

 near the tip only short black bristles which sometimes extend slightly on 

 the outer side ; second joint with scarcely more than an apical circlet of tiny 

 black bristles ; dorsal hump practically at the middle of the basal segment 

 of the third joint. 



Thorax blackish grey, hardly at all shining and not at all striped ; 

 pubescence composed of rather abundant but not dense short depressed pale 

 grey hairs which become longer and conspicuous above the wing-bases and on 

 the jDostalar calli down to the scutellum, and intermixed all over are rather 

 abundant suberect longer stiffer black hairs which are inconspicuous on the 

 disc (unless viewed sideways), but which stand out long and conspicuous 

 between the humeri and the wing-base ; pleurse dusted pale grey and bear- 

 ing whitish grey pubescence. Scutellum similar to the thorax in colour and 

 clothing, but the pale grey pubescence fairly long and conspicuous round 

 the margin. 



Abdomen blackish grey -with two bowed blackish stripes and scarcely any 

 fulvous coloring ; hind corners of the basal segment and the fore corners of 

 the second segment obscurely fulvous, and the extreme sidemargins of all 

 the segments also obscurely fulvous ; rather densely clothed with short 

 adpressed pale greyish yellow pubescence except on the two blackish brown 

 stripes ; the blackish stripes leave an intermediate fairly broad slightly grey 

 dorsal space, and about half-way between the blackish stripes and the side- 

 margins are faint traces of two other blackish strii^es (especially about the 

 base of each segment) which extend inwards about the base of the 

 second segment and become obvious through the absence of grey pubescence 

 and through the presence of numerous inconspicuous short black hairs, so 

 that (\vhen viewed from behind) the abdomen shows traces of the usual 

 Tabanoid three rows of grey flecks of which the outer ones on the second 

 segment have almost the usual triangular shape ; on the four blackish stripes 

 thereis a fair amount of short sloping ])lack bristly pubescence; the outer 

 margins of the two middle blackish stripes are hardly dentate even though 

 the dark colour widens out slightly at the hindmargins of the second and 

 third segments ; all the stripes become indistinct on the sixth and seventh 



