J 74 MUSCIDiE. 



5. scabricwla, Hal. E. M. iii. 320, 6 (1836). Castaneo-fusca, 

 abdomine nigro. Long, f ; alar. H lin. 



Head and thorax cJiestnut-hrovm, opaque, very thickly shagreened, and 

 set with minute vjhite points, lying jlat. Head very long. Eyes small. 

 Arista wLitish. Teeth of the scutellum very short, decurved. Wings 

 whitish-hyaline, with pale ferruginous veins, shorter than iu S. denti- 

 cidata ; costal vein brown ; rib finely ciliate. Abdomen black. Legs 

 short, set with very minute whitish bristles, light brown; knees and 

 tarsi paler ; hind femora of the male not thickened ; tarsi very short ; 

 hind metatarsus as long as the next three joints together. 



Rare. In Mr. Haliday's collection. (E.) 



Genus IL BORBORUS. 



BoRBORUS, A. C. et B., Meig. Borhorus et Apterina, Mcq. ; Hal. 

 Sphcerocera, Nerea, et Mycetia, Desv. Copromyza p., et Limosina p., 

 Zett. 



Arista puhescens, quasi exarticulata. Frons et scutellum setigerce. Areola 



analis completa. Vena dlscalis transversa alee margini proxima. 



Front less produced than in Sphajrocera, some long bristles bordering 

 the frontalia ; face longer. Antennae obliquely advanced ; arista pu- 

 bescent, the basal joint very minute. Thorax smooth ; scutellum short, 

 with a pair of bristles at the end. Anal areolet of the wing and the 

 small one before it complete ; transverse veins remote, the discal one 

 being close to the border, and the pobrachial vein scarcely, if at all, 

 continued beyond it ; cubital and pra;brachial veins not approaching. 

 a. Wings and halteres developed. 



h. Hind tibiae armed with a spur. 



c. Middle tibiae bristly on the outer side. Species 1-3. 



c c. Middle tibise hardly bristly on the outer side. Species 4-8. 



h b. Hind tibiae without spurs. Species 9. 

 a a. Wings and halteres rudimentary. — Apterina. Species 10. 



1. nitidus, Meig. Zw. vi. 201. 4 (1830); Desv.; Mcq.; Hal. 

 E. M. iii. ; Zett. — hamatus, Hal. E. M. I. ; Curt. Niger, nitidus, hal- 

 teribus albidis, alis ferrugineis, maris femoribm posticis hasi uncinatis. 

 Long. 2i ; alar. 5 lin. 



Shining -black. Frontalia dull-black. Palpi not dilated. Thorax 

 with a brassy tinge. Wings rust-yellow ; veins brown ; transverse 

 veins often darker. Halteres whitish. Segments of the abdomen nearly 

 equal in length. Legs hairy ; posterior coxae, trochanters, and knees 

 sometimes rust-brown ; middle tibia with a roio of long spines dozen the 

 outside. Male. Abdomen with two filiform appendages beneath. Femora 

 very thick ; fore pair serrate below; hi?id pair longer, curved, armed at 



