88 MUSCID^. 



than its length, and by more than its length from the flexure of the 

 prsebrachial. 

 Bare. (E.) 



156. concinnata? Meig. Zw. iv. 412. 301 (1824). Nigra, cano- 

 tomentosa, capite albo, antennarum articulo sexto ad trientem incrassato, 

 thorace nigro-quadrivittato, alis subciiiereis, vena prcebrachiali angulum 

 perobtusumfngente, abdomine obconico subtessellato. Long. 4 ; alar. 



7 lin. 



Frontalia deep black, slightly widening in front ; bristles of the front 

 descending to one-third of the face from the base of the antennas ; face 

 vertical ; epistoma not prominent ; palpi tawny. Antennae nearly 

 reaching the epistoma ; second . joint longer than deep ; third almost 

 linear, truncated at the tip, more than four times the length of the 

 second; fourth very short; fifth distinct; sixth bare, full twice the 

 length of the third, stout for one-third of the length. Costal vein end- 

 ing at a little in front of the tip of the wing ; subcostal vein ending 

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

 beyond half the length ; radial vein ending at about five-sixths of the 

 length ; cubital vein joining the costal near its tip ; prcebrachial vein 

 forming a very obtuse and not sharply defined angle at its flexure, from 

 whence it is almost straight to its tip; discal transverse vein with 

 two very slight curves, parted by much less than its length from the 

 border, and by a little less from the flexure of the prasbrachial vein. 



Rare. In tlje late Mr. Stephens' s collection. (E.) 



157. infensans, n. Nigra, cano-subtomentosa, capite albo, /<zm- 

 libus quarta excepta setosis, thorace nigro-quadrivittato, scutello ferru- 

 gineo, alis subcinereis, alulis albis, abdomine obconico. Long. 4 ; alar. 



8 lin. 



Bristles of the front descending to one-fourth of the face ; face 

 slightly oblique ; facialia bristly for three-fourths of the length ; episto- 

 ma not prominent. Antennae reaching the epistoma ; third joint linear, 

 rounded at the tip, full four times the length of the second ; sixth very 

 minutely pubescent, stout towards the base, much longer than the 

 third. Costal vein ending at some distance in front of the tip of the 

 wing ; subcostal vein ending at a very little beyond one-third of the 

 length ; mediastinal vein ending at much beyond half the length ; 

 radial vein ending at about four-fifths of the length; cubital vein 

 joining the costal near its tip; prsebrachial vein forming an almost 

 right not sharply defined angle at its flexure, near which it is slightly 

 curved inward, and is thence straight to its tip ; discal transverse vein 

 with two very slight curves parted from the border by less than its 

 length. 



Eare. (E.) 



158. angusta, Mcq. A. S. E. F. ser. 2. viii. 469. 23 (1850). Ni- 

 gra, cano-subtomentosa, capite albo, facialibus fere totis setosis, thorace 



