264 MUSCID^E. 



Brownish-aeneous. Wings brownish ; transverse veins darker. Tarsi 

 ferruginous at the base. 



Abundant on pools. (E. I.) 



16. Hecate, Hal. E. M. 1. 175 (1834).; -fuscipennis, Mcq. Fusco- 

 cenea, alis fuscanis, venis transversis obscuris utrinque hyalino-guttatis, 

 tarsis basiferrugineis. Long. ; alar. 1^ lin. 



Brownish-aeneous. Wrings brownish ; transverse veins darker, with 

 hyaline dots along each side. Tarsi ferruginous at the base. 



Very rare; found at Hollywood, near Belfast. In Mr. Hali- 

 day's collection. (I.) 



17. pusilla, Meig. Zw. vi. 126. 33 (1830). infecta, Hal. E. M. I. 

 175. Nigro-cenea, facie albicante, alis fuscanis ; venis transversis obscuris, 

 pedibus nigris. Long. -| ; alar. 1^ lin. 



JEneous-black. lace whitish. Wings brownish; transverse veins 

 darker. Legs black. 



Rare; found at Hollywood, near Belfast. In Mr. Halida/s 

 collection. (I.) 



Subgenus 6. ILYTHEA. 



ILYTHEA, Hal. A. N. H. iii. 408 (1839). Ephydra p., Hal. ; Curt. 



Caput depressum; facie convexa, inter antennas elevata, nisi lateribus 

 nuda ; clypeo recondito. Mentum incrassatum. Lobelia crassa, retro- 

 producta, obtusa. Arista dorso pectinata. 



Head depressed. Face convex, elevated between the antennae, bare ex- 

 cept on the sides. Clypeus withdrawn. Mentum thickened. Lobelia 

 thick, produced hindward, obtuse. Arista pectinated above. 



18. spilota, Hal.; Curt. Brit. Ent. 413 (1832). Nigra, facie 

 ferruginosa, alis nigro-punctatis, tarsis flavis. Long. 1 ; alar. 2 lin. 



Black. Face ferruginous. Wings with black dots. Tarsi yellow. 

 Not rare about pools and ditches. (E. I.) 



Subgenus 7. 



C^NIA, Desv. E. M. 800 (1830); Mcq. Ephydra p., Fal. ; Meig.; 

 Hal.; Zett. 



Caput depressum ; facie protuberante et margine perisiomatis villosis out 

 setosis ; clypeo recondito. Mentum valde incrassatum. Arista dorso 

 pectinata. 

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



border of the peristoma. Clypeus withdrawn. Mentum much thickened. 



Arista pectinated above. 



