108 MR. F. WALKER ON NEW SPECIES OF DIPTERA. 



breadth of the head ; scajje black. Abdomen black, with whitish 

 pubescence, rather longer and much broader than the thorax. An- 

 terior tarsi piceous, except towards the tips ; hind tarsi black. Wings 

 blackish, brown hiudward ; veins black ; halteres testaceous. Length 

 of the body 3 lines ; of the wings 6 lines. 



Fam. TABANID^, Leach. 

 Gren. Pangonia, Latr. 



19. Pangonia caliginosa. Fcem. Piceo-nigra, capite subtus pec- 

 toreque albido pilosis, proboscide thoracis longitudine, antennis ru- 

 fescentibus apice nigricantibus, alis nigricantibus maculis duabus 

 discalibus cinereis. 



Female. Piceous black. Head beneath and pectus thickly clothed 

 with whitish hairs. Proboscis as long as the thorax. Palpi piceous. 

 Antennae reddish, lanceolate, curved upward, piceous at the base, 

 blackish at the tips. Thorax with a line of black hairs along each 

 side. Abdomen oval, longer and broader than the thorax ; hind bor- 

 ders of the segments piceous. Wings blackish, cinereous towards the 

 hind border, with two elongated paler cinereous discal spots ; veins 

 black; fore branch of the cubital vein slightly curved, forming a 

 slightly obtuse angle at its flexure, from whence it emits a short 

 branch. Length of the body 6 lines; of the wings 16 lines. 



Gen. Tabantjs, Linn. 



20. Tabanus coh^rens. Fcem. Piceus, antennis ochraceis apice 

 nigris, abdomine fulvo apice nigricante segmentorum marginibus pos- 

 ticis vittaque testaceis, pedibus fulvis, tarsis posterioribus femoribus- 

 que anticis piceis, tibiis anticis apice tarsisque anticis nigricantibus, 

 alis cinereis apud costam fuscescentibus. 



Female. Piceous ; closely allied to T. serus. Head, thorax, and pectus 

 with hoary tomentum. Head with a slender piceous callus which is 

 dilated in front. Antennae ochraceous, piceous at the base, black 

 towards the tips ; third joint with a very small horn. Abdomen tawny, 

 blackish towards the tip ; hind borders of the segments testaceous, 

 this hue most apparent on the hinder segments ; a dorsal testaceous 

 stripe, which is slightly dilated hindward, and is obsolete at the base 

 and at the tip. Legs tawny ; coxae hoary ; posterior tarsi, except at 

 the base, and fore femora piceous ; fore tibiae towards the tips and 

 fore tarsi blackish. Wings cinereous, brownish along the costa ; veins 

 black, tawny at the base ; fore branch of the cubital vein almost 

 straight, forming an obtuse and rounded angle at its flexure ; halteres 

 testaceous. Length of the body 7 lines ; of the wings 14 lines, 



21. Tabanus Papouinus. Mas. Piceus, antennis rufescentibus apice 

 nigris, thorace cinereo tomentoso, abdomine fusco basi fulvo segmen- 



