268 MUSCJDJE. 



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

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

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



Subgenus 10. EPHYDRA. 



EPIIYDRA, Fal. ; Meig. ; Mcq. ; Bouche; Hal. A. N. H. hi. 510 (1839). 



Caput depressum ; facie porrecta fomicata villosa. Peristoma margine 

 pectin at um. Menturn canaliculatum, labella in quiete retrocuspidata ex- 

 cipiens. Antenna? articulo tertio conico ; arista basi villosa. Ungues 

 subrecti. Onychia obsoleta. 



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

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

 bella while in repose. Third joint of the antenna conical. Arista hairy 

 at the base. Ungues almost straight. Onychia obsolete. 



The singular larvae of this group are figured by Bouche fNa- 

 turgeschichte der Insckten). 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, Pal. Act. Holm. 1813. 255. 3. 1 (1813) ; Meig.; Mcq.; 

 Hal. ; Zett.- salinarum, Bouche, Naturg. i. 99. pi. 6. f. 13, 14, larva 

 ct pupa. Obscure rcnea, facie alba aut flavicante, arista villosa, alis 

 fuscanis, tibiis tarsisqtie basi testaceis. Var. /3. Thorace ferruginoso. 

 Yar. y. Pedibus nigris. Long. If ; alar. 4 lin. 



Dull ceneous. Face white or yellowish. Arista hairy. Wings brownish. 

 Tibiae and tarsi testaceous at the base. Yar. /3. Thorax rather ferru- 

 ginous. Yar. y. Legs black. 



Common. (E. I.) 



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

 autjlavicante, arista nomdsi basi pubescente, alis fuscanis, pedibus nigris. 

 Long. If ; alar. 4 lin. 



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

 base. Wings brownish. Legs black. 



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

 considered it. (E. I.) 



Subgenus 11. CANACE. 



CAXACE, Hal. A. N. H. hi. 411 (1839). 



Caput depressum. Fades transversa, perpendicular is, subimpressa, late- 

 ribns c'diata ; clypeus exsertus. Peristoma magnum. Oculi elliptici, 

 transversi. Arista pubescens. Areolce prcebracltialis et analis parv<z, 

 complete. Abdomen conicum, 1-ammlatum, segmento secundo maxima. 



