170 MUSCID^. 



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

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

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

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

 drate, with no transverse furrow. Wiugs 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 prfebrachial 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 prfebracliial 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 tibios slightly 

 curved. 



These flies inhabit aquatic plants. 



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

 21 ; Fal. ; Meig. ; Mcq. ; ZcVi.—niflpes, F. ; Pz. 1 Fn. Ix. \^.—den- 



tipes, ^c]\d\.—Jlavipes, Schr. — jjaliistris, Latr. Nigra, glauco-tomen- 

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

 Long. 4 ; alar. 8 lin. 



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

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

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

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

 a wliltish band. Legs bright red ; tarsi brown. 



Generally distributed. (E. S. I.) 



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

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

 3i ; alar. 7 lin. 



Terruginoxis, with whitish tomentum. Third joint of the antennce 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. DORVCERA. 



DoRYCERA, HofTm. ; Meig. Zw. vi. 29 (1830); Mcq.; Zett. Mnsca 

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

 —Geoff. 



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

 depressa. Fades valdc obliqua. Antennce porrectre ; arliculm tertius 

 secundo brevior ; arista basi incrassata et subangulata . 



