ASILINAB 



ROBBER FLIES OF THE WORLD 



435 



Text-Figure 30. — Pattern of distribution of the genus Ommatius Wiedemann. 



the abdomen scanty, appressed and setate, the surface 

 pollinose ; the first tergite has 4 or more lateral bristles 

 on each side. Postlateral margins of remaining tergites 

 with or without bristles; in the type of genus such 

 bristles are scarcely present. Males with eight tergites, 

 the last being quite short but not concealed. Females 

 with eight, the last being half as long as the seventh. 

 ISIale terminalia not rotate, and with well developed 

 superior forceps, curved and apposed apically, which 

 are with or without a dorsal notch. Gonopod shorter ; 

 the hypandrium is about a fourth the total length of the 

 terminalia. Females with the terminalia quite short, 

 the dorsal proctiger barely protruding beyond the 

 eighth tergite. 



This is a large and widely distributed genus particu- 

 larly abundant in the Old World and South Pacific. It 

 is peculiar because, although species are found in North 

 America up to 45° north latitude, they appear to be 

 completely absent from Europe; thus far only three 

 species are known from the whole Palaearctic region 

 and none are found south of Brazil. 



Distribution : Nearctic : Ommatius hdboquivari Wil- 

 cox (1936) ; ieaTTieri Wilcox (1936) ; Iromleyi Pritch- 

 ard (1935) ; gemma Brimley (1928) ; maciilatus Banks 



(1911); parvulus Schaeffer (1916); pretiosus Banks 

 (1911) ; tibialis Say (1823). 



Neotropical : Ommiatius abana Curran (1953) ; aemmla 

 Curran (1928); apicalis Scliiner (1868); iarbiellinii 

 Curran (1934) ; costatus Rondani (1850) ; erythropus 

 Schiner (1867); exilis Curran (1928); fuscipennis 

 Bellardi (1862) ; holosericeus Schiner (1867) ; margi- 

 nellus Fabricius (1781) [=saccas Walker (1855), vi- 

 treus Bigot (1875)]; neotropicus Curran (1928) 

 norma Curran (1928) ; orenoguensis Bigot (1876) 

 parvus Bigot (1875) \=pumilus Bellardi (1861)] 

 peregrinus Osten Sacken (1887) ; pilosulus Bigot 

 (1875) ; pmnilus Macquart (1847) ; ruficauda Curran 

 (1928) ; rufipes Macquart (1846) ; scopifer Schiner 

 (1868); spatulatus Curran (1928); vjillistoni Curran 

 (1928). 



Palaearctic: Ommatius aegyptius Efflatoun (1934); 

 ater Bromley (1935) ; striatus Efflatoun (1934). 



Ethiopian: Ommiatius albovittatus Wiedemann 

 (1824) ; annulitarsis Curran (1927) ; atroga-ster Bigot 

 (1859) ; levisi Bromley (1947) ; brevicomis Curran 

 (1927) ; canicoxa Speiser (1913) ; cAw7^if07i€wr!<« Speiser 

 (1910) ; cingulatus Bromley (1936) ; coarctatus Mac- 

 quart (1855) ; dasypogon Oldroyd (1939) ; erythropy- 



