170 MUSCID.E. 



pressed. Face oblique. Epistoma prominent. Peristoma much pro- 

 duced, like a short beak. Proboscis short ; labella broad. Palpi almost 

 filiform. Antenna long ; third joint elongate-conic, convex above, shorter 

 than the second ; sixth setiform, stout, bare. Thorax elongate-subqua- 

 drate, with no transverse furrow. Wings moderate ; costal vein end- 

 ing on the hind border very near the tip of the wing ; subcostal ending 

 at about one-third of the length; mediastinal ending before half the 

 length ; radial ending a little beyond five-sixths of the length ; cubital 

 and prasbrachial very slightly diverging between the transverse veins, 

 almost parallel from the discal transverse to the border ; discal trans- 

 verse slightly oblique, curved outward, parted by twice its length from 

 the prasbrachial transverse, and by half its length from the border. 

 Abdomen subfusiform, longer than the thorax. Legs rather long ; hind 

 femora slightly incrassated, armed beneath with spines ; hind tibia slightly 

 curved. 



These flies inhabit aquatic plants. 



1. sphegeus, F. S. I. ii. 429. 40 (1781) ; Gmel. ; Pz. ! Fn. Ixx. 

 21; Fal.; Meig. ; Mcq. ; ^ii.rufipes, F. ; Pz. ! Fn. Ix. 13. den- 

 tipes, Schell.jlavipes, Schr. -palustris, Latr. Nigra, glauco-tomen- 

 tosa, thorace quadrivittato, alis cinereis, pedibus rufis, tarsis fuscis. 

 Long. 4; alar. 8 lin. 



Black, shining, slightly metallic, with glaucous tomentum. Second 

 joint of the antennae much longer than the third ; sixth white towards 

 the tip. Thorax with four black stripes. Wings grey, with a lurid 

 tinge in front and along the borders of the veins. Halteres red, with 

 a whitish band. Legs bright red ; tarsi brown. 



Generally distributed. (E. S. I.) 



2. Hseffneri, Fal. Sciom. 3. 21 (1820); Meig.; Mcq.; Zett. 

 Ferruginea, albido-tomentosa, thorace sexvittato, alis subluridis. Long. 

 S^ ; alar. 7 lin. 



Ferruginous, with whitish tomentum. Third joint of the antenna a 

 little shorter than the second, brown towards the tip ; sixth white to- 

 wards the tip. Thorax with six ferruginous stripes. Wings slightly 

 lurid, almost limpid towards the hind border. Halteres testaceous. 



Less common than the preceding species. (E. I.) 



Genus XIII. DORYCERA. 



DORYCERA, Hoffm. ; Meig. Zw. vi. 29 (1830); Mcq.; Zett, Musca 

 p., F. E. S. Scatophaga p., F. S. A. Tetanocera p., Latr. ; Coqueb. 

 Geoff. 



Corpus angustum, lineare. Caput longum. Frons porrecta, conica, 

 depressa. Fades valde obliqua. Antenna porrecta? ; articulus tertius 

 secundo brevior ; arista ba&i incrassata et subangulata. 



