164 CIIIRONOMIDjE. 



que totis, necnon tibiis posterioribus tarsisque apice fuscescentibus. Long. 

 2t ; alar. 4 lin. 



Male. Black. Antenna? with black plumes. Wings limpid-white ; 

 costal, radial, and cubital veins testaceous, the rest white. Ilalteres 

 pale testaceous. Legs testaceous ; femora, fore tibia, and tips of the 

 tibia and of the tarsi, brownish. 



Not common. In Mr. Saunders' collection. (E.) 



48. opacus? Meig. Zw. vi. 249. 90 (1830). Mas, ater, alis albo- 

 limpidis, venis halteribusque albis, pedibus fuscis. Long. 1 ; alar. 2 lin. 



Male. Deep black. Antenna? with black plumes. Wings limpid- 

 white ; veins and halteres white. Legs brown. 

 Not common. (E.) 



49. albipes? Zett. Dipt. Scand. ix. 3588. 124 (1850). Mas et 

 Fcem. niger, antennis basi flavis, alis pubescentibus sublimpidis, venis 

 pedibus<\ViQ albidis. Long. 2-3 ; alar. 3-4 lin. 



Male and Fern. Black. Antenna? pale yellow towards the base. 

 Wings nearly limpid, pubescent ; veins whitish. Halteres white. Legs 

 whitish, slender. Male. Antenna? with black plumes. 



Generally distributed. (E. S. I.) 



50. inopertus, n. Mas, niger, alis limpidis, veuis albidis apud 

 costam testaceis, abdomine pedibusque sordide viridibus. Long. 2 ; alar. 

 3 lin. 



Male. Black. Antenna? with black plumes. Wings limpid ; costal, 

 radial, and cubital veins pale testaceous, the rest whitish. Halteres 

 whitish. Abdomen and legs dull green. 



Not common. (E.) 



51. pedellus, D. G. Ins. vi. 146. 17 (1783); Latr.; Meig.; Mcq.; 

 Zett.; Gim.; Sta?g. -fuscus,Ij. littoralis, Schr. ; Geoff. cantons, F.; 

 Meig. Kl. Zw. Mas et Fcem. niger, nitidus, alis albo-limpidis, abdomine 

 viridi apicem versus nigro, pedibus viridibus, femoribus tibiis et tarsorum 

 articulis apice nigris. Long. 3-4 ; alar. 4-5 lin. 



Male and Fern. Black, shining. Wings limpid-white ; veins whitish. 

 Halteres grass-green. Abdomen grass-green, black towards the lip, 

 clothed with white pubescence. Legs pale green ; tips of the femora, 

 of the tibiae, and of the joints of the tarsi, black. Male. Plumes of the 

 antenna? brown, white towards the tips ; fore tibia? towards the tips, 

 and fore metatarsi towards the base, black. Fern. Thorax green, with 

 three black stripes. 



Generally distributed. (E. S. I.) 



52. fuscipennis? Meig. Zw. i. 36. 31 (1818). Var.? Fcem. 

 viridi-niger, nitidus, alis subfuscis basi limpidis, venis halteribusque 

 albidis, his apice nigricantibus, pedibus testaceis, tibiis apice nigris, 

 femoribus anticis nigro-cinctis. Long. 3 ; alar. 6 lin. 



Var.? Fern. Greenish-black, shining. Palpi and antenna? testaceous. 

 Wings indistinctly tinged with brown, limpid towards the base ; costal, 



