268 MUSCIDiE. 



towns on the Continent, and frequents sewers, where it tinds a 

 combination of salt and lime like that in its natural and original 

 habitation, the sea-shore chalk-cliils, a little below high-water mark. 



Subgenus 10. Ephydra. 



Ephydra, Fal. ; Meig. ; Mcq. ; Bouclie' ; Hal. A. N. H. iii. 510 (1 839). 



Caput depressum ; facie j^orrecta fornicata villosa. Peristoma mar(jine 

 pectinatum. Mentimi canaticidatum, lahella in quiete retrocnspidata ex- 

 cipiens. Antennce articido tertio conico ; arista Lasi villosa. Ungues 

 siibrecti. Onychia ohsoleta. 



Head depressed. Face porrect, arched, hairy. Peristoma pectinated 

 on the border. Mentum channelled, receiving the backward-pointed la- 

 hella while in repose. Third joint of the aniennee conical. Arista hairy 

 at the base. Ungues almost straight. Onychia obsolete. 



The singular larvae of this group are figured by Bouche (Na- 

 turgeschichte der Insekten). The posterior spiracles are placed 

 each at the extremity of a slender conical shaft, springing from a 

 common stem, and with it longer than the rest of the body. 



34. riparia, Fal. Act. Holm. 1813. 255. 8. 1 (1813) ; Meig.; Mcq.; 

 Hal.; Zett.- — salina?'um, Bouche, Natm-g. i. 99. pi. 6. f. 13, 14, larva 

 et pupa. Obscure senea, facie alba aut flavicante, arista villosa, alis 

 fuscanis, tibiis tarsisque basi testaceis. Var. ^. Thorace ferrugiuoso. 

 Var. y. Pedibus uigris. Long. If ; alar. 4 lin. 



Dull (eneons. Face ivhite or yellowish. Arista hairy. Wings broicnish. 

 TibifE aud tarsi testaceous at the base. Var. /3. Thorax rather ferru- 

 ginous. Var. y. Legs black. 



Common. (E. I.) 



35. micans, Hal. E. M. L 175 (1834). Obscure viridis, facie alba 

 aut flavicante, arista nonnisi basi pid)escente, alis fuscanis, pedibus nigris. 

 Long. If ; alar. 4 hu. 



Dull green. Face white or yellowish. Arista pubescent only at the 

 base. Wings brownish. Legs black. 



This may be a mere variety of E. rijMria ; as such Fallen has 

 considered it. (E. 1.) 



Subgenus 11. Canace. 



Canace, Hal A. N. H. iii. 411 (1839). 



Caput depressum. Fades transversa, perpendictdaris, subimpressa, late- 

 ribus ciliata ; clypeus exsertus. Peristoma magnum.. Ocidi elUptici, 

 transversi. Arista pubescens. Areola; prcebracldalis et analis parvte, 

 completcE. Abdomen conicum, 1 -annulatum , segmento secundo maximo. 



