264 MUSCID^. 



Bro7cnish-(meotis. Wings broivnish ; transverse veins darJcer. Tarsi 

 feiruginous at the base. 



Abundant on pools. (E. I.) 



16. Hecate, Hal. E. M. 1. 175 (\^M).—fuscipennis, Mcq. Fusco- 

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

 tarsis basifernigineis. Long, f; alar. \\ lin. 



Brownish-cEneous . Wings brownish; transverse veins darken', 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).— iw/^c^a, Hal. E. M. I. 

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

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



j3^?ieous-black. Face whitish. Wings brownish; transverse veins 

 darker. Legs black. 



Rare; found at Hollywood, near Belfast. In Mr. HaKday'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. Labella crassa, retro- 

 producta, obtusa. Arista dorso pectinata. 



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

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 Clypeus withdrawn.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

 thick, produced hindward, obtuse. Arista pectinated above. 



18. spilota, Hal.; Cm-t. 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^enia, 



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

 Hal. J Zett. 



Caput depressum ; facie protuberante et margine peristomatis villosis ant 

 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 Clypeus withdrawn.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 tnuch thickened. 



Arista pecfmated above. 



