LIST OF DIPTEKA. 237 



Brown. Head with white down and tomentum. Palpi white. 

 Antenna? red, small, black towards the tips ; third joint hardly 

 dilated, very obtusely angular above. Thorax with six whitish 

 stripes. Pectus with white tomentum. Abdomen with a whitish 

 dorsal stripe, and on each side with a row of triangular testaceous 

 spots ; hind borders of the segments whitish ; under side fawn- 

 colour, with white tomentum. Legs testaceous ; tarsi black. 

 Wings limpid ; veins black; first branch of the cubital vein forming 

 a slightly obtuse angle near its base, and rejecting thence an ex- 

 tremely short branch ; subanal vein joining the anal near the border. 

 . Halteres white. Male. — Head not twice broader than long. Eyes 

 large, red, composed of extremely small facets, with an aeneous bor- 

 der, which is much broadest in front. Female. — Head more than 

 twice broader than long, with a small black callus in front between 

 the eyes, which are seneous and composed of extremely small facets. 

 Length of the body 5 lines ; of the wings 8 lines. 



a — d. Bagdad, Turkey in Asia. Presented by W. K. Loftus, Esq. 



357. Tabanus polygonus. 



Mas. Fulvus ; oculi fulvi, margine nigro-purpureo ; palpi albi ; 

 antennce luteo-fulvce, minutes y vix dilatatce, apiee nigrce; tho- 

 rax fusco quadrivittatus ; abdomen vitta interrupta nigri- 

 cante, maculis trigonis dorsalibus marginibusque posticis 

 albidis ; alee limpidce. Fcem.? Oculi nigro-cenei; thoracis 

 vittce latissimce ; abdominis vittce latce integrce ; pedes antici 

 tibiis apice nigricantibus, tarsis nigris. 



Male. Tawny, slightly covered with whitish tomentum and 

 down. Head rather large, about twice broader than long. Palpi 

 white. Antenna? very small, luteous tawny, black towards the tips ; 

 third joint hardly dilated, forming a slightly obtuse angle. Eyes 

 large, tawny, composed of rather large facets, with a purplish black 

 border, which is composed of extremely small facets and is very 

 broad in front, Thorax with four broad brown stripes ; a few black 

 hairs on each side ; scutellum brown. Abdomen with a blackish 

 stripe, which is widely interrupted in the middle ; each segment 

 whitish along the hind border, and with a whitish dorsal triangular 

 spot. Wings limpid ; veins black, tawny towards the base and 

 along the costa ; first fork of the cubital simple, hardly angular near 

 its base ; subanal vein joining the anal at some distance from the 

 border. Length of the body 7 lines ; of the wings 13 lines. 



