BORBORIDES. 171 



Body narrow, linear, pubescent, with a few bristles. Head long. 

 Front porrect, conical, depressed. Face very ohlique. Epistoma and 

 peristoma not prominent. Ardennce poirect ; ndrd joint elongate-coni- 

 cal, shorter than the second ; sixth setiform, bare, incrassated and slightly 

 bent toioards the base. Thorax elongate-subquadrate. Wings rather 

 short ; costal vein ending on the hind border near the tip of the wing ; 

 subcostal ending at much beyond one-third of the length ; mediastinal 

 ending at much beyond half the length ; radial ending at ])eyond seven- 

 eighths of the length ; cubital and prajbrachial very slightly diverging 

 between the transverse veins, and very slightly converging from the 

 discal transverse to the tip ; discal transverse straight, nearly upright, 

 parted by nearly twice its length from the prtt^brachial transverse, and 

 by less tlian half its length from the border. Abdomen linear, longer 

 than the thorax. Legs pubescent ; femora with very few bristles. 



1. grammum, F. E. S. iv. 346. 143 (1781); Latr. ; Coqucb. ; 

 Meig. ! Zw. vi. pi. 57. f. 5 ; Mcq. ; Zett. — Geoif. Nigra, cinereo-to- 

 mentosa, capite pallido, thorace quadrivittato, alis albis fusco variis, 

 abdomine univittato, pedibus fulvis. Long. 3 ; alar. 5§ liu. 



Dull-black, with cinereous tomentum. Head testaceous beneath, 

 white about the eyes. Front luteous, ferruginous on each side. Tho- 

 rax with four black stripes, outer pair dilated in front. Wings whitish, 

 partly brown in front and towards the tips ; transverse veins clouded 

 with brown. Halteres pale yellow. Abdomen with a cinereous stripe. 

 Legs tawny ; tarsi brown towards the tips. 



Not common, but appearing occasionally in profusion. (E.) 



The following additional species of this family have been re- 

 corded as British : — 



Tetanops, lal. LuciNA, Meig. Eukina, Meig. 



1. myopina, Fal. 1. fasciata, Meig. 1. lurida, Meig. 



Subfamily 2. BORBORIDES. 



BoRBOKlDES, Hal.; Westw. CI. 1. 144 (1839). Borborus, Meig. 

 Sph(erocera,\j^.ix. Copromysa \i.,Ya.\. Futrellide(e p., J)esv. Sp/ue- 

 rocerida, Mcq. ; Hal. E. M, Copromy~ince, Zett. 



Antennarum articidtis tertim sphceroideus ; arista dorsalis, elongata, gra- 



cillima. Alartim vena suhcostalis vix costa; trientem pertiyigens. Alula: 



fere nullce. Metatarsus posticus dilatatus, articulo secundo brevior. 



Front broad, subquadrate, a Uttlc inclined. Orbits, frontalia, and 



stemmatic triangle usually distinguished. Face broad, impressed, 



membranaceous. Epistoma prominent, bearing bristles at the corners. 



Clypeus exseited, transverse. Peristoma very large, rounded. Labium 



thick, tleshy : below with a broad bellviug sheath of hornv consistence. 



