CTENOPIIORA. 333 



fiisco, abdomine hiteo fascia interrupta maculisque lateralibus nigris, 

 pedibiis nigris, femoribus basi fiilvis. Long. 4|-6 ; alar. 9-].l lin. 



Yellow. Head luteous, with a black triangular spot behind, and a 

 black dot on each side. Proboscis with a black stripe above. Palpi 

 and antennte black. Thorax with three black stripes, the lateral pair 

 short ; sides and pectus with black spots. Wings greyish, narrower 

 than those of P. pratensis, with a testaceous tinge along the costa ; 

 stigma pale brown. Halteres testaceous, with blackish knobs. Abdo- 

 men luteous, with an interrupted black stripe ; a row of black spots 

 along each side. Legs black ; femora tawny, black towards the tips. 



Common, (E. S. I.) 



36. imperialis, Meg. ; Meig. Zw. i. 196. 39 (1818) ; Mcq. ; 

 Schumm. ; StKg. ; Zett. — scalaris, lloffm. ; Meig. ; Ross. (V.). Flava, 

 capite luteo striga nigra, antennis nigris basi pallidis, thorace vittis 

 tribus nigi'is, alls siihlimpidis, abdomine vitta dorsali interrupta nigra, 

 pedibus testaceis, femoribus tibiisque apice tarsisque nigris. Long. 

 8-9; alar. 14-15 Ihi. 



Yelloio. Head luteous, with a black streak behind. Proboscis and 

 palpi testaceous. Antennae black, luteous, or yellow at the base. Thorax 

 with three l)road black stripes, the middle one in advance ; scutellum 

 brown. Metathorax with a brown stripe, and sometimes with a brown 

 spot, on each side. TVings tiearly limpid ; stigma dark brown ; veins 

 black, testaceous at the base. Halteres testaceous ; club partly brown. 

 Abdomen with a black dorsal stripe, which is generally interrupted on 

 the fore border of each segment. Legs testaceous, long, slender ; tarsi, 

 except towards the base, and tips of the femora and of the tibiae, black. 



Not rare. (E. S. I.) 



37. crocata, L. F. S. 1739(1761); F. ; Gmel. ; Meig.; Mcq.; 

 Gimm. ; Zett. ; Schumm. ; Staig. ; lloss. (V.). — Jlavo-fasciala, D. G. 

 ^dtra, macula verticis, thoracis fascia antica maculisque lateralibus flavis, 

 alls cinereis fusco-nebulosis, stigmate nigro, abdomine fasciis tribus 

 luteis, femoribus basi fulvis. Long. 10; alar. 12 lin. 



Deep .black. Head with a luteous s])Ot on the vertex. Thorax with 

 a short yellow band in front, and with luteous spots along each side. 

 TFii/f/s grey, more or less clouded with brown ; stigma black. Halteres 

 piceous. Abdomen with three luteous bands ; femora tawny towards 

 tlic base. 



Not common. (E. I.) 



Genus XVI CTENOPHORA. 



Ctenopiiora, F. S. a. 17 (1805) ; ]\Ieig. ; Curt. ; Mcq. ; Zett. ; Gimm. 



Tipulu p., L. ; Schr. ; F. E. S. ; Gmel. Tauyptera, Latr. Dictenidia 



et Xiphura, BruUc. 

 Cor))us magnum, oblongum, robustum, glabriculum, sicpissimc nitidum. 



