CHIRON OMUS. 191 



brown, the rest whitish. Halteres whitish. Legs brown, slender, mo- 

 derately long. 

 Not rare. (E.) 



177. appositus, n. Mas, niger, alis albidis sublimpidis, venis 

 halterib usque albis, illis apud costam testaceis, abdomine nigro-fusco, pe- 

 dibus obscure fuscis. Long. 2|; alar. 4 lin. 



Male. Black. Antennae with black plumes. Wings whitish, nearly 

 limpid ; costal, radial, and cubital veins testaceous, the rest white. Hal- 

 teres white. Abdomen blackish-brown. Legs dark brown, long, slender, 

 pubescent. 



Not common. (E.) 



178. perexilis, n. Fcem. pallide testaceus, alis albo-limpidis, 

 venis halteribusque albis, pedibus testaceis breviusculis. Long, i; 

 alar. 1 lin. 



Fein. Pale testaceous. Wings limpid-white ; veins and halteres 

 white. Legs pale testaceous, rather short and stout. 

 Rare. In the British Museum. (E.) 



179. byssinus, Schr. F. B. iii. 2330 (1798); Meig. ; Mcq.; 

 Zett. ; Gim. ; Stseg. Mas et Fcem. ater, alis lacteo-albis basi nigris, 

 venis albis, halteribus pedibusque nigris, his validiusculis. Long. 1-1-J ; 

 alar. 2 lin. 



Male and Fern. Deep black. Wings milky-white, black at the base ; 

 veins white. Halteres black. Abdomen slightly pubescent. Legs 

 black, rather stout. Male. Plumes of the antennse black, whitish to- 

 wards the tips. 



Generally distributed. (E. S. I.) 



180. minimus, Meig. Zw. i. 47. 61 (1818); Mcq.; Stseg.; Zett. 

 Mas et Foem. ater, alis albo-limpidis, venis halteribusque albidis, pedibus 

 nigro-piceis. Long. -| ; alar. 1^- lin. 



Male and Fern. Deep black. Wings limpid-white ; veins and halteres 

 whitish. Legs piceous-black, pubescent. 

 Not rare. (E.) 



181. compertus, n. Fcem. niger, alis subcinereis, venis albidis 

 apud costam testaceis, halteribus nigricantibus, pedibus ferrugineis, tarsis 

 nigris. Long, li ; alar. 2 lin. 



Fern. Black. Wings greyish ; costal, radial, and cubital veins testace- 

 ous, the rest whitish. Halteres blackish. Legs ferruginous ; tarsi black. 

 Not common. (E.) 



182. contingents, n. Mas, niger, alis limpidis, halteribus venis- 

 que albidis, illis apud costam testaceis, pedibus fuscis. Long. 1^ ; alar. 

 2 lin. 



Male. Black. Antennae with black plumes. Wings limpid; costal, 

 radial, and cubital veins testaceous, the rest ^chitish. Halteres whitish. 

 Abdomen slightly pubescent. Legs brown. 



Not rare. (E.) 



