EPIIYDRA. 265 



The species will form two groups : 

 a. Third joint of the antennae obtuse. Species 19-21. 

 a a. Third joint of the antennae almost conical. Species 22. 



19. albula, Meig. Zw. vi. 115. 4 (1830) ; Hal. Facie cinerascente, 

 tJiorace obscure-ceneo, halteribus albidis, abdomine glauco incisuris obscuris. 

 Long. 1^; alar. 3 lin. 



Dull-ceneous. Face greyish. Halteres whitish. Abdomen glaucous ; 

 sutures dark. 



Eare; found in August at Loch Fad, Isle of Bute. In Mr. 

 Halida/s collection. (S.) 



20. pahistris, Fal. Hydr. 4. 2 (1813); Meig.; Mcq.; Hal.; Zett. 

 caricicola, Desv. Nigro-tenea. capite pedibusque nigris, facie setosa, 

 halteribus fuscanis. Long. 1 ; alar. 2 lin. 



^neons-black. Head and legs black. Face bristly. Halteres brownish. 

 Common in marshes. (E. I.) 



21. obscura, Meig. Zw. vi. 115. 3 (1830). Obscure cenea, episto- 

 mateflaw setuloso, alis hyalinis, pedibus cinerascentibus. Long. J ; alar. 

 H hn. 



Obscure ceneous. Epistoma yellow, somewhat bristly. Wings limpid. 

 Halteres white. Legs cinereous. 

 Eare. (E.) 



22. defecta, Hal. E. M. I. 174 (1834). Nigro-a3nea, antennis 

 suhtus tarsisque luteis, scutello cyanescente, alis obscuris hyalino-gut- 

 tatis. Long. |; alar. 1^ lin. 



^neons-black. Antenna3 beneath and tarsi luteous. Scutellum bluish. 

 Wings dark, with hyaline dots. 

 Common in swampy spots. 



Subgenus 8. SCATELLA. 



SCATELLA, Desv. E. M. 801 (1830); Hal. Notiphila p., Fal ; Zett. 

 Ephydra p., Pal. ; Meig. ; Mcq. ; Hal. ; Zett. 



Caput depressum ; facie buccata et margine peristomatis villosis aut setosis ; 

 clypeo recondito. Antenna articulo tertio obtuso. Arista arcuata> 

 pubescens. Ungues curvati, divaricati. Onychia manifesta. 

 Head depressed. Face inflated, hairy or bristly, as is also the border 



of the peristoma ; clypeus withdrawn. Third joint of the antenna obtuse. 



Arista curved, pubescent. Claws bent. Onychia conspicuous. 



23. sibilans, Hal. E. M. I. 175 (1834). Ferruginosa, facie fla- 

 mda setosa, alis obscuris, abdomine tenescente. Long. \ ; alar. 1 lin. 



Ferruginous. Face yellowish, bristly. Wings dark. Abdomen some- 

 what aneous. 



Yery common on the sea-coast at Hollywood, near Belfast. 

 (E.I.) 



VOL. II. 2 M 



