DASYPOGONINAE 



ROBBER FLIES OF THE WORLD 



207 



fourth, 5 or 6 at the immediate apex, chiefly dorsal 

 and anterior, a sublateral row of 1 anterior and 1 dor- 

 sal, 4 posterior, and behind these 1 anterior and 2 an- 

 terodorsal ; these numbers are in some species reduced. 

 Middle tibia with 3 to 5 anterodorsal, 5 to 6 postero- 

 dorsal, and 5 or 6 posteroventral bristles. Anterior 

 femur with apical bristles similar to the middle femora. 

 Anterior tibia with a similar complement of bristles, 

 2 rows dorsally, a single stout posteroventral row of 

 stout bristles. Apex of tibia without spine. The 

 anterior tarsus quite short, especially the basitarsus, 

 which is but little longer than the second segment. 

 Tarsi end in stout, rather blunt claws with large, wide 

 pulvilli and long bristlelike empodium, not or scarcely 

 swollen at the base; the empodium may be reduced 

 until it reaches barely beyond the basal swelling of 

 the claw. 



Wings: The marginal cell widely open; anterior 

 branch of third vein ends at the wing apex, the 

 posterior branch a short distance behind. The first 

 posterior cell is widely open, fourth cell slightly nar- 

 rowed to two-thirds its maximum width, or occasion- 

 ally sharply narrowed, but open in all species examined. 

 Anal cell unusually widely open; middle end vein of 

 the second basal cell short; alula moderately wide; 

 ambient vein complete. 



Abdomen : At the base the abdomen is nearly as wide 

 as the mesonotum and rather strongly tapered. Males 

 with eight tergites, the eighth from a third to a half 

 as long as the seventh, female with eight tergites, the 

 last tergite quite long. Pile of the abdomen fine, short 

 and erect or appressed, but becoming a little longer 

 laterally especially on the first three tergites. The 

 male terminalia is rather large, rotate about a fourth. 

 The epandrium is cleft to the base but the sides are 

 closely adjacent except apically where they are flared 

 apart. Gonopod prominent, basally swollen with a 

 long, cylindrical, obtuse, distal process. Proctiger 

 long, flat, prominent and shovellike. Hypandrium dis- 

 tinct but quite short. The whole male structure pre- 

 sents a clublike appearance. Female terminalia with 

 5 pairs of long, slender, apically rounded, thin or 

 slightly spoon-shaped, dorsoventrally compressed 

 spines. They appear to have a few weak bristles ven- 

 trolaterally ; the last sternite is unusually long and 

 troughlike, apically notched or apically split for a short 

 distance and extending considerably beyond the eighth 

 tergite. 



Distribution : Palaearctic : Habropogon aegyptius 

 Efflatoun (1937); aTbibarbis Macquart (1838); ap- 

 pendiculatus Schiner (1867) ; bipartitus Villeneuve 

 (1931); carthaginiensis Becker (1915); doriae Eon- 

 dani (1873); elegantulus Efflatoun (1937); exquisi- 

 tus Wiedemann in Meigen (1820) [ = rutihis Meigen 

 (1838)]; heteroneurus Timon-David (1951); lati- 

 frons Loew (1870) ; longiventris Loew (1847) ; per- 

 tusus Becker (1908); rubriventris Macquart (1849); 

 scheno Walker (1849); spissipes Hermann (1909); 

 striatus Fabricius (1794) ; verticalis Becker in Becker 

 and Stein (1913). 



Ethiopian: Habropogon antigenes Walker (1849); 

 rhodesii Ricardo (1925); senilis Wulp (1899). 



Oriental: Habropogon jucundus Wulp (1872) 

 [=vertebratus Bigot (1878]. 



Verrall (1909) in his appendix list of Palaearctic 

 species of Asilids includes a species, Habropogon 

 gujoti Hermann from Sinai. I have not seen a 

 reference or date for this species, which may not 

 be published. 



Graptostylus, new genus 



Type of genus : Graptostylus dolosus, new species. 



Medium size flies with slender, elongate abdomen and 

 large, long, broad wings as long as the abdomen. This 

 rather curious fly suggests the Stichopogonini in its 

 general appearance. Certainly the extraordinarily 

 dense, silvery to greyish white pollen everywhere cover- 

 ing the fly, except on the legs and except on the black 

 mesonotal stripes, is strongly suggestive of that tribe. 

 The venation and the terminalia are also similar to 

 those flies. However, the vertex is not divergent above, 

 the lateral metasternum is densely long pilose and not 

 bare. While the head, thorax and abdomen are densely 

 pollinose, the legs are shining black, slender, rather 

 long and quite without pollen. Bristles of mesonotum, 

 tibiae and tarsi extraordinarily long. Graptostylus 

 traces in the Stenopogonini key to the genus Habro- 

 pogon Loew, to which it is quite dissimilar. Length 

 12 mm. 



Head, lateral aspect : Face quite short on the upper 

 half, with a low gibbosity below, rendered more con- 

 spicuous because of the retreating eye. Antenna at- 

 tached a little above the middle of the head and a little 

 longer than the head. The occiput is prominent only in 

 the middle and below, the posterior eye margin almost as 

 convex as the anterior eye margin. Occiput with fine, 

 short pile above, 4 or 5 long, slender, laterally curved 

 bristles placed deeply behind the vertex and with dense, 

 long fine pile on the ventral half of the occiput. Pro- 

 boscis stout, obliquely truncate at the apex, relatively 

 short but distinctly extended beyond the face and 

 directed obliquely forward. Palpus with the first seg- 

 ment short, not excavated, the second segment long, 

 swollen through the middle, with narrowed apex and a 

 number of fine hairs, except on the attenuate portion. 

 Ventral surface of the proboscis with numerous, long, 

 fine hairs on the basal half. Antenna relatively slender, 

 the first segment iy 2 times as long as the second, the 

 second about as long as high, the third segment a little 

 widened through the middle and slightly narrowed near 

 the apex, with two stout, downtumed microsegments, 

 the first of which is only as long as wide and the second 

 is two or three times as long as the first. First segment 

 with numerous, long, fine, white hairs and other bristly 

 hairs ventrally, laterally and shorter hairs dorsally. 

 Second segment with short, fine, white hairs dorsally 

 and ventrally. 



Head, anterior aspect : Width of face below the an- 

 tenna slightly more than a third the head width and 

 slightly widening below. It is densely covered with 



