CHIKONOMUS. 187 



157. lucens? Zett. D. Sc. ix. 3574. 102 (1850). lucidus, Staeg. 

 Mas, niger, valid us, alls albidis basi nigricantibus, venis albis, halteribus 

 fuscis, pedibus piceis validiusculis. Long. 3 ; alar. 4 lin. 



Male. Black, stout, pubescent. Antennae with black plumes. Wings 

 whitish, blackish at the base; veins white. Halteres brown. Legs piceous, 

 pubescent, rather stout. 



Bare. (E.) 



158 minutus? Zett. D. S. ix. 3522. 39 (1850). Foem. niger, 

 alls limpidis, venis halteribusque albidis, illis apud costam testaceis, pedibus 

 testaceis, tarsis fuscescentibus. Long, f ; alar. 1^ lin. 



Fein. Black. Wings limpid ; costal, radial, and cubital veins testa- 

 ceous, the rest whitish. Halteres whitish. Legs dull testaceous; tarsi 

 brownish. 



Bare. (E.) 



159. opplens, n. Mas, niger, thorace nitente, alis sublimpidis, 

 venis halteribusque albidis, illis apud costam testaceis, pedibus nigrican- 

 tibus. Long. 1^-2 ; alar. 3-3^- lin. 



Male. Black. Antennae with black plumes. Thorax shining. Wings 

 nearly limpid ; costal, radial, and cubital veins testaceous, the rest whitish. 

 Halteres whitish. Legs blackish, long, slender. 



Not rare. (E.) 



160. plebeius? Meg. ; Meig. Zw. i. 40. 44 (1818). Var.? Fcem. 

 niger, alis limpidis, venis halteribusque albidis, illis apud costam fuscis, 

 pedibus pallide fuscis, metatarsis anticis albidis apice fuscis. Long. 2 ; 

 alar. 4 lin. 



Var.? Fern. Black. Wings limpid; costal, radial, and cubital veins 

 brown, the rest whitish. Halteres whitish. Legs pale brown ; tarsi and 

 tips of the femora and of the tibiee darker ; fore metatarsi whitish, except 

 at the tips. 



Rare. In the British Museum. (E.) 



161. nitidicollis, Steph. MSS. Mas, niger, thorace nitente, alis 

 albo-limpidis, venis albis, halteribus fuscis, pedibus ferrugineis pubescen- 

 tibus. Long. 2 ; alar. 3 lin. 



Male. Black. Antennae with black plumes. Thorax shining. Wings 

 limpid-white ; veins white. Halteres brown. Legs ferruginous, pubes- 

 cent. 



Eare. In the British Museum. (E.) 



162. pergens, n. Mas, canus, thorace vittis tribus nigris, alis 

 subcinereis, venis albidis apud costam fuscis, halteribus albis, abdomine 

 nigro subtus cinereo, pedibus fulvis, tibiis apice tarsisque nigris. Long. 

 2^ ; alar. 4 lin. 



Male. Hoary. Antennae with black plumes. Thorax with three 

 black stripes. Wings greyish ; costal, radial, and cubital veins, and 

 ducal transverse veinlet brown, the other veins whitish. Halteres white. 



