124 



ROBBER FLIES OF THE WORLD 



a little longer on the sides of the first tergite. First 

 tergite with a large, oval patch of bristles, the posterior 

 row sometimes stouter. Second tergite near the middle 

 laterally with a tuft of bristly pile and sometimes 

 bristles. Males with 8 tergites, the eighth being 

 from one-third to one-sixth as long as the seventh. Fe- 

 males with eight tergites, the last being nearly half as 

 long as the seventh. Male terminalia not rotate, the 

 epandrium widely divided nearly to the base forming 

 rather prominent superior forceps. Gonopod large but 

 not quite as long as the upper forceps. Hypandrium 

 varying from a short, broad, basal plate to a long, tri- 

 angularly produced process. Genital cavity largely 

 open. Females with 7 pairs of stout, long, blunt spoon- 

 like spines on the acanthophorites. 



Stenopogon is a dominant genus in the Holarctic 

 region with the known species nearly equally divided 

 between the two hemispheres. Several Australian 

 species described in this genus almost certainly should 

 be transferred to Neoscleropogon Malloch ; they are left 

 here in Stenopogon until studied. 



Distribution: Nearctic: Stenopogon albibasis Bigot 

 (1878) ; andersoni Bromley (1937) ; arizonensis Brom- 

 ley (1937); boharti Bromley (1951); breviusouloides 

 Bromley (1937) ; breviuscidus Loew (1872) ; calif orniae 

 Walker (1849) ; calif omioides Bromley (1937) ; cazieri 

 Brookman (1941) ; coyote Bromley (1931) ; engelhardti 

 Bromley (1937); fells Bromley (1931); ploridensis 

 Bromley (1951) ; gratus Loew (1872) [ = univittafus 

 Loew (1874)] ; huachucanus Hardy (1942) ; inquinatus 

 Loew (1866) ; jubatoides Bromley (1937) ; jubatus Co- 

 quillett (1904); martini Bromley (1937); modestus 

 Loew (1866) ; morosus Loew (1874) ; neo jubatus Wil- 

 cox and Martin (1945) ; nigritulus Coquillett (1904) ; 

 nigriverticellus Bromley (1937) ; obscuriventris Loew 

 (1872) ; propinquus Bromley (1937) ; rufibarbis Brom- 

 ley (1931) ; ricfibarbokhs Bromley (1937) ; stonei 

 Bromley (1937) ; timberlahei Bromley (1937) ; tink- 

 ham.i Bromley (1951) ; utahensis Bromley (1951) ; wil- 

 coxi Bromley (1937). 



Neotropical : Stenopogon fuscolimbatus Bigot 

 (1878) ; lugubris Williston (1901). 



Palaearctic: Stenopogon albociliatus Engel (1929) ; 

 aphrices Walker (1849) [ = aphrisus Wulp (1899) 

 lapsus'] ; arabicus Macquart (1838) ; avus Loew (1874) : 

 brevipennis Wiedemann in Meigen (1820) ; callosus 

 Pallas in Wiedemann (1818) ; cinereus Engel (1940) ; 

 coracinus Loew (1847), coracinus carbonarius Engel 

 (1929) ; costatus Loew (1870), costatus escorialensis 

 Strobl (1905) ; csikii Strobl (1901) ; echelus Walker 

 (1849) ; elegantulus Wiedemann (1820) ; elongatissi- 

 mus Efflatoun (1937) ; elongatus Meigen (1804) ; festae 

 Bezzi (1925); flavibarbis Enderlein (1934); fulvus 

 Meigen (1838) ; gracilis Macquart (1838) [=fu?nipen- 

 nis Becker (1913)]; gruenbergi Becker (1911) 

 [ = denudatus Loew (1856) female]; harpax Loew 

 (1868); heteroneurus Macquart (1838); imbrex 

 Walker (1849) ; inermipes Strobl in Czerny and 



Strobl (1909); iphippus Seguy (1932); iphis 

 Seguy (1932); ischyrus Seguy (1932); junceus 

 Wiedemann in Meigen (1820) [ = tanygastrus Loew 

 (1861)]; haltenbachi Engel (1929); Jcocheri Timon- 

 David (1951) ; holenatii Gimmerthal (1847) ; laevi- 

 gatus Loew (1851) [ = bicolor Bigot (1878)], laeviga- 

 tus melanostolus Loew (1868)], laevigatus milvoides 

 Engel (1930), laevigatus nigripes Engel (1940); 

 macilentus Loew (1861) [= semitestaceus Loew 

 (1868)]; milvus Loew (1847); mollis Loew (1868); 

 nigriventris Loew (1868), nigriventris wolf, Mik 

 (1887); ochripes Loew (1861), ochripes escalarae 

 Strobl (1905) ; peregrinus Seguy (1932) ; porcus Loew 

 (1870); roederi Bezzi (1895) [ = rufi,pilus Loew 

 (1873)], rufipilus ruficauda Engel (1930); sabaudus 

 Fabricius (1794), sabaudus fulvulus Pallas in Wiede- 

 mann (1818) [ = occultus Loew (1861), pyrrhomus 

 Wiedemann (1818), pyrrhous Schiner (1862)] ; schisti- 

 color Gerstaecker (1861), schisticolor mydon Engel 

 (1930); sciron Loew (1873); strataegus Gerstaecker 

 (1861) [ = antar Schiner (1867)]; superbus Port- 

 schinsky (1873) [ = theseus Loew (1873) female]: 

 taboardae Strobl in Czerny and Strobl (1909) ; theseus 

 Loew (1873) male; tristis Meigen (1820) [ = maurus 

 Mergerle (ms.) in Meigen]; icerneri Engel (1932); 

 xanthotrwhus Brulle (1832) [ = graecus Loew (1855)], 

 xanthotrichus xanthomelas Loew (1868) [ = ochreatus 

 Loew (1847), ?pyrrhus~Lo&vt (1870)]. 



Ethiopian: Stenopogon holoxanthus Hermann 

 (1907); macquartii Jaennicke (1867). 



Oriental: Stenopogon ambryon Walker (1849); 

 damias Walker (1849); nigrofasciatus Brunetti 

 (1928) ; piceus Boeder (1893) ; pulverifer Walker 

 (1851) ; raven Bromley (1938) ; subtus Bromley (1935). 



Genus Scleropogon Loew 



Scleropogon Loew, Berliner Ent. Zeitschr., vol. 10, p. 26, 1866. 

 Type of genus: Scleropogon picticornis Loew, 1866, by 

 monotypy. 



Large flies of comparatively slender, tapered abdo- 

 men and often reddish, clay yellow or brown color. 

 Abdomen basally as wide as the mesonotum. They are 

 characterized by the circular head from frontal aspect, 

 the absence of protibial spine, the not rotate male ter- 

 minalia, the short pile but comparatively abundant 

 bristles and specially by the presence of pile or more 

 usually pile and bristles on the metapleuron; this last 

 characteristic appears to be the only conclusive char- 

 acter separating these flies from Stenopogon Loew. 

 The flies of Stenopogon are much the same size, shape 

 and general coloration but completely lack pile or 

 bristles on the metapleuron. The type of genus is 

 Scleropogon picticornis Loew, and it is a California 

 species; the first posterior cell is closed and stalked as 

 it is in Scleropogon truqui, ochraceus, helvolus and 

 other species of this genus, but open in some species as 

 Scleropogon consanguineus. 



