1 84 



AN ACCOUNT OF BRITISH FIIES. 



0. incallidas, Wlk. ... 



O. obsepiens, Wlk. ... 



O. pa oa)izc?/s, Wlk. ... 



O. oppertiis, Wlk. ... 

 O. novatiis,\\W, 



O. offecUts, Wlk. 



O. sordideHits, Zett. ... 



0. fn'gidus, Ztii. 

 O. notatus, Mg. 



O. lucens, Zett. 

 O. ?inmitus, Zett. 

 0. oppkus, Wlk. 

 O. nitidicollis, Steph. 

 O, pergens, Wlk. 



0. dcproperaiis, Wlk. 

 O. obsistens {$), Wlk 

 0. pertr actus, Wlk. .. 



0. motitriis, Wlk. 



Legs stouter than peniiacer, and hind metatarsus 

 is less than two-thirds of the length of the hind 

 tibia (nearly allied to former). Length, 2^ lin. 



Black. Abdomen greenish-black. Legs dingy 

 whitish, slender. Length, i^ lin. 



Grayish-black. Legs piceous, slender. Length, 

 ii lin. (?). 



Black, stout. Thorax shining. Abdomen pubes- 

 cent. Legs stout. Length, 2\ lin. ( $ ). 



Cinereous-black. Legs dark brown, slender. 

 Length, i| to 2 lin. Common. 



Black, slender. Thorax hoary, with three black 

 almost confluent stripes. Abdomen piceous, 

 black. Legs brown, long and slender. Length, 

 2i lin. ( $ ). 



Testaceous. Thorax with three black stripes ; 

 metathorax black. Abdomen brown, first, 

 second and third veins testaceous ; discal trans- 

 verse veinlet brown. Legs dull and testaceous, 

 long ; tips of tibice and tarsi black. Length, 3 

 . lin.' 



Black. Thorax testaceous, with three broad black 

 stripes. Legs brown. Length, i lin. {$). 



Testaceous. Thorax with three black stripes ; 

 metathorax black. Abdomen pale brown. 

 Legs testaceous, slender ; tarsi and tips of tibice 

 brown. Length, i^ lin. ( ? ). 



Black, stout and pubescent. Legs piceous, pubes- 

 cent, stout. Wings blackish at the base ; veins 

 white. Halteres brown. Length, 3 lin. ( $ ). 



Black. First, second and third veins testaceous, 

 Halteres white. Legs dull, testaceous, tarsi 

 brownish. Length, f lin. ( $ ). 



Black. Thorax shiny. Legs black, long and 

 slender. Halteres white. Veins as above. 

 Length, ij to 2 lin. {$ ). 



Black. Thorax shiny. Veins white. Halteres 

 brown. Legs ferruginous, pubescent. Length, 

 2 lin. (<?). 



Hoary. Thorax with three black stripes ; abdo- 

 men black, cinereous beneath. Legs tawny, 

 long and slender. Length, 2\ lin. ( $ ). 



Black. Thorax as above. First, second and third 

 I veins dark brown, rest pale brown. Yellow 

 I band on hind border of each abdominal segment. 

 Legs black, stout. Length, li lin. ( $ ). 



Black. Plrst, second, and third veins black, rest 

 brown. Probably the $ oideproperans(¥.\.T.). 



Hoary, slender. Thorax as above. Veins white. 

 I Abdomen cinereous-black ; sutures whitish. 

 I Legs piceous, rather long and slender. Length, 

 2Uin.(S). 



Gray. Abdomen black, hind borders of the seg- 

 ments gray. Legs black, femora thick. 

 Length, i^ lin. 



