DASTPOGONINAB 



ROBBER FLIES OF THE WORLD 



275 



vex, the surface bare, without pile. Pleurou with a 

 number of fine, long hairs above, below and on the collar. 

 Anterior extension of mesopleuron alone has pile; 

 pteropleuron, hypopleuron and sternopleuron without 

 pile and no pubescent patch spot. Metapleuron with a 

 middle band of scattered, long hair; metanotal slope 

 swollen, micropubescent only; metasternal slope with 

 numerous, long hairs. Metasternum with 12 to 15 long 

 hairs ; postmetacoxal area membranous. Tegula pubes- 

 cent only. Prosternum small and dissociated. 



Legs: The anterior 4 femora are very slightly 

 thickened towards the base; hind pair moderately 

 elongate, very slightly wider in the middle and beyond, 

 stout without being thickened, their tibiae also stout, 

 though gradually tapered towards the base. All pile 

 and bristles pale except on the tarsi. The femora are 

 without bristles. The hind femur bears scattered, fine, 

 rather long, erect hairs above, laterally and below but 

 never with a dense fringe. Hind tibia with a dense, 

 nearly erect, ventral fringe extending to the basal 

 fourth; the pile is nearly as long as the basal tibial 

 thickness ; this tibia bears 7 weak, dorsomedial bristles, 

 6 slightly stronger dorsolateral bristles and 3 ventro- 

 lateral bristles. Apex with 1 dorsal, 2 lateral bristles, 

 1 medial, 4 ventral elements. Middle femur with fine, 

 scanty, long pile above and below ; the tibia has longer 

 and stouter bristles, 5 anterodorsal, 2 weak posterior, 

 4 weak posteroventral, and 3 quite long, attenuate, 

 apically fine, oblique, ventral bristles. Anterior femur 

 with a few long hairs below and shorter hair above 

 on its tibia but long, dorsal bristles are lacking; there 

 is 1 minute, anterobasal, 2 to 4 short dorsal and 3 long, 

 stout, attenuate, oblique, ventral bristles. Apex with 

 a strong, curved spine ; base of basitarsus microdentic- 

 ulate. All tarsi end with long, slender pulvilli, slender, 

 sharp claws only slightly curved and empodium a 

 little more than half as long as claw. Hind coxa 

 without tubercle. 



Wings: The marginal cell is widely open; anterior 

 branch of the third vein ends at wing apex; fourth 

 posterior cell open, but narrowed to two-thirds of its 

 maximum width; anal cell widely open; the second 

 basal cell ends in 3 veins. Alula large, ambient vein 

 complete. 



Abdomen : Abdomen and wings of the same length ; 

 abdomen rather robust, very slightly wider across the 

 third tergite and the third tergite not quite as long as 

 wide. The abdomen is slightly tapered from the end of 

 the third segment; the surface is quite smooth; first 

 tergite not swollen or ridged laterally. Pile of abdo- 

 men quite scanty, fine, moderately long and erect, some- 

 what longer along the sides of the first and second ter- 

 gite, and longer laterally everywhere than in the 

 middle. Bristles quite absent upon the abdomen ; ster- 

 nites, except for the first, with some fine long hair. 

 Male with six well developed tergites and the seventh is 

 only a fourth as long as the sixth. Female with eight 

 tergites, the last two reduced in length. Male termi- 

 nalia rotate about one-fourth to the right, dominated by 

 the quite large, shallow, bowllike, uncleft, unnotched 



epandrium with tiny proctiger set medioapically. The 

 epandrium is long but wide. The very short, small 

 hypandrium leaves the cavity of the genitalia open and 

 exposed. The gonopod is comparatively large and 

 quite convex, almost subglobular in appearance on its 

 basal part and with a distal slender process. The hy- 

 pandrium is so short it is almost concealed beneath the 

 short seventh tergite. Female with a row of concave 

 spines on the acanthophorites. 



Distribution: Australian: Aterpogon cyrtopogo- 

 noides Hardy (1930). 



Paraterpogon Paramonov, new genus 



Fioubes 527, 1127, 1136, 1685, 1733, 1737, 1913, 1916 



Paraterpogon Paramonov, in litt. Type of genus : Paraterpogon 

 punctatus, Paramonov, in litt. 



Small, hump-backed flies with a drooping abdomen ; 

 the thorax very sparsely and minutely pilose, the 

 bristles weak and reduced, the mesonotum and abdomen 

 strongly and coarsely punctate. They are related to 

 Aterpogon Hardy; its only distinguishing characters 

 are the presence of small but stout bristles on the sides 

 of the hind femur, the punctate surface, the presence of 

 only minute, sparse, fine, appressed setae on the meso- 

 notum instead of long pile, the presence of supraalar 

 bristles and a single antennal microsegment instead of 

 two microsegments. Possibly related to Cophura Osten 

 Sacken and distinguished by the humped mesonotum, 

 simple epandrium and absence of scutellar bristles. 

 Length 6 to 8 mm. 



Head, lateral aspect: The face barely visible below 

 near the epistoma ; the eye is normal, strongly convex 

 anteriorly, gently convex behind and slightly recessive 

 anteroventrally below. The occiput is narrowly visible 

 in profile through the middle, obliterated near the 

 vertex, a little more prominent at the bottom. Occipi- 

 tal pile fine and only moderately long and scanty, be- 

 coming a little more abundant on the lower third and 

 spreading inward medially. On the upper third of 

 the occiput are a few, extremely weak, slender bristles, 

 9 or 10 pairs. Proboscis small, strongly compressed 

 laterally, rather blunt apically, with a dorsomedial 

 ridge. From a dorsal view it is slightly expanded near 

 the apex and again on the basal third. The apex bears 

 a number of long, fine hairs, the base below with only 

 a few long hairs. It is directed obliquely forward. 

 The palpus clearly of two segments, the first segment 

 excavated; both segments with a few long hairs ven- 

 trally. The antenna is attached to the upper third of 

 head and moderately elongate and slender. The first 

 segment is little more than one-third as long as the 

 second, the second twice as wide at apex; the third 

 segment is as long as the first two together and except 

 at its immediate base and apex, it is about as wide as 

 the end of the second segment; this third segment 

 bears a single, moderately long, microsegment, to which 

 in turn is attached a short, distinct, minute spine. First 

 segment with 2 or 3 minute setae ; second with several 



