DASTPOGONINAB 



ROBBER FLIES OF THE WORLD 



285 



dorsal bristles and at the middle a prominent, dorso- 

 medial bristle ; ventrally on the outer third are 2 stout 

 bristles. Apex of tibia with 1 dorsomedial, 1 ventro- 

 medial, and 4 black ventral bristles. Hind basitarsus 

 stout, slightly longer than the next two segments. All 

 tarsal bristles numerous, quite stout and long. Middle 

 femur with only a conspicuous, stout, posterodorsal 

 bristle near the apex, and a much smaller one behind. 

 This tibia bears 4 anterodorsal bristles, of which 1 at 

 the middle and 1 beyond are conspicuously long and 

 spikelike and matching each is a similar bristle ven- 

 trally. There are also 2 short posterodorsal bristles near 

 the middle. 



Anterior femur quite like the middle femur; its tibia 

 has 5 short, stout, anterodorsal bristles, 4 still shorter 

 posterodorsal, 4 posteroventral and 1 very long, distal, 

 ventral bristle. Bristles of the apex set back from the 

 end of the tibia. The apex bears a short, stout protu- 

 berance with very stout, basally swollen, curved, blunt, 

 black spines of no great length; it is apposed to a 

 basitarsal elevation which bears 10 or 12 small, conical 

 denticles. Claws stout, long, only moderately sharp, 

 the pulvilli quite long and spatulate, the empodium 

 long, and gradually swollen toward the base. 



Wings: The wings are lightly tinged with brown. 

 Marginal cell open, by considerably less than its maxi- 

 mal width. Anterior branch of the third vein ends 

 well above the wing apex, the posterior branch far be- 

 hind. First posterior cell fully open, base of second 

 posterior cell strongly widened and arched. Medial 

 crossvein long, paralleling the wing margin. Fourth 

 posterior cell narrowed. Anal cell closed to the margin, 

 posterior crossvein almost wanting. Alula large, am- 

 bient vein complete. 



Abdomen: The abdomen at the base is as wide as 

 the mesonotum, reduced in width at the end of the first 

 segment and slightly tapered beyond to the end of the 

 abdomen, comparatively elongate and cylindrical. Ab- 

 domen covered with rather dense, short, subappressed 

 setae and short, coarse pile laterally on the second seg- 

 ment and much longer pile laterally on the first seg- 

 ment. Posterolateral margins of first segment with 

 5 or 6 quite stout, long bristles. Males with eitjht 

 segments, but the eighth tergite is short and confined 

 to the left side and below. Male terminalia almost 

 completely rotate; the hypandrium large, triangular 

 and a little convex on its dorsally turned surface and 

 with some posterior, bristly pile. Epandrium fully 

 cleft but apposed towards the base and with numerous 

 bristles and bristly hairs posteriorly and some setae on 

 the upper surface. Gonopod quite prominent, thick, 

 laterally convex and conspicuous, with dense, long, pale 

 bristles and bristly pile, especially on the posterior half. 

 It bears posteriorly a stout process which is more or less 

 bent upward and curves toward the medial line. 



Distribution: Australian: Stisochymus salinator 

 Walker (1849). 



Genus Austrosaropogon Hardy 



Figures 77, 179, 533, 592, 1161, 1170,1744, 1760, 1761, 1804 



Austrosaropogon Hardy, Ann. Mag. Nat. Hist., ser. 10, vol. 14, 

 p. 11, 1934. Type of genus : Austrosaropogon claviger 

 Hardy, 1934, by original designation. 



Austrosaropogon Hardy has 1 subgenus, Daplolestes, 

 new subgenus. 



Polished, shining flies, especially so on the abdomen 

 and legs. Abdomen is slightly clavate, the male ter- 

 minalia large and prominent but with aedeagus rela- 

 tively concealed within the open, ventral cavity, which 

 is partly rotate. Female acanthophorites and spines 

 not recessed but the spines are quite short. Mesonotum 

 low and elongate. Antenna relatively short, the third 

 segment with a short, cylindrical microsegment and 

 central spine. The palpus is small and attenuate and 

 not clavate, and the upper intercalary vein at end of 

 discal cell is well developed. Length 12 to 18 mm. 



Head, lateral aspect: The face is moderately promi- 

 nent above and below, with a distinct concavity across 

 the middle. The occiput is uniformly developed but 

 only sublaterally. It bears long, fine pile ventrally and 

 weak bristles along the middle and upper part. Behind 

 the vertex there are only 2 comparatively slender 

 bristles on each side. Proboscis comparatively long, 

 depressed at the base with a prominent dorsal ridge 

 and the apex tapered to a blunt point. The palpus is 

 of two segments, the first excavated, the second robust 

 and a little narrowed at base, and apex with a large, 

 apical pore and numerous, bristly hairs. The antenna 

 is attached only a little below the plane of the vertex. 

 Antenna elongate, considerably longer than the head 

 and slender. The first segment is 2 or 3 times as long 

 as wide, longer than the second, which is nearly twice 

 as long as wide; the third is not quite twice the com- 

 bined length of the first two. Third segment is of 

 nearly uniform width and bears at the apex a short, 

 spoon-shaped microsegment with a concealed spine. 

 Both basal segments have long, fine setae dorsally. 

 The first segment has 10 long, slender bristles laterally 

 and below ; the second has 2 or 3 such bristles. 



Head, anterior aspect : The head is about 1% times 

 wider than high with the face a third the head width 

 and barely wider below. Face densely pale pubescent, 

 with 7 or 8 fine, scattered hairs on the lower half and 

 a row of weak bristles or only bristly hairs across 

 the epistoma. Front moderately large; nearly bare, 

 without ocular pile or bristles but with a narrow 

 submedial band containing 4 slender, bristly hairs and 

 a few other hairs. Vertex but little excavated; the 

 ocellarium is low with a pair of bristly hairs behind 

 the ocelli and 1 or 2 minute hairs between the ocelli. 

 Anterior eye facets rather strongly enlarged. 



Thorax: The thorax is comparatively long; the 

 mesonotum is low and gently arched with a wide, 

 medial, bare stripe divided by acrostical pubescence 

 and microsetae. Lateral mesonotum with stripes of 

 pollen or pubescence. Humerus with only a few, fine 



